using Microsoft.AspNetCore.Mvc;

namespace AngularTemplateDrivenFormsLab.Controllers
{
    [Route("api/[controller]")]
    public class ReportsController : Controller
    {
        [HttpGet("[action]")]
        public IActionResult GetPdfReport()
        {
            return File(virtualPath: "~/assets/sample.pdf",
                        contentType: "application/pdf",
                        fileDownloadName: "sample.pdf");
        }
    }
}

import { Injectable } from "@angular/core";
import { Observable } from "rxjs/Observable";
import { HttpClient } from "@angular/common/http";

@Injectable()
export class DownloadPdfDataService {

  constructor(private httpClient: HttpClient) { }

  public getReport(): Observable<Blob> {
    return this.httpClient.get("/api/Reports/GetPdfReport", { responseType: "blob" });
  }
}

img-src 'self' data: blob:
default-src 'self' blob:
object-src 'self' blob:

import { DownloadPdfDataService } from "./../download-pdf-data.service";
import { WindowRefService } from "./../../core/window.service";
import { Component, OnInit } from "@angular/core";
import { DomSanitizer, SafeResourceUrl } from "@angular/platform-browser";

@Component({
  templateUrl: "./view-pdf.component.html",
  styleUrls: ["./view-pdf.component.css"]
})
export class ViewPdfComponent implements OnInit {
  private nativeWindow: Window;
  private pdfBlobUrl: string;
  sanitizedPdfBlobResourceUrl: SafeResourceUrl;

  constructor(private downloadService: DownloadPdfDataService,
    private windowRefService: WindowRefService, private sanitizer: DomSanitizer) { }

  ngOnInit() {
    this.nativeWindow = this.windowRefService.nativeWindow;
    this.downloadService.getReport().subscribe(pdfDataBlob => {
      console.log("pdfDataBlob", pdfDataBlob);
      const urlCreator = this.nativeWindow.URL;
      this.pdfBlobUrl = urlCreator.createObjectURL(pdfDataBlob);
      console.log("pdfBlobUrl", this.pdfBlobUrl);
      this.sanitizedPdfBlobResourceUrl = this.sanitizer.bypassSecurityTrustResourceUrl(this.pdfBlobUrl);
    });
  }
}

<h1>Display PDF Files</h1>

<div *ngIf="sanitizedPdfBlobResourceUrl">
  <h4>using iframe</h4>
  <iframe width="100%" height="600" [attr.src]="sanitizedPdfBlobResourceUrl" type="application/pdf"></iframe>
  <h4>using object</h4>
  <object [attr.data]="sanitizedPdfBlobResourceUrl" type="application/pdf" width="100%"
    height="100%"></object>
  <h4>usin embed</h4>
  <embed [attr.src]="sanitizedPdfBlobResourceUrl" type="application/pdf" width="100%"
    height="100%">
</div>

this.sanitizedPdfBlobResourceUrl = this.sanitizer.bypassSecurityTrustResourceUrl(this.pdfBlobUrl);

  printPdf() {
    const iframe = document.createElement("iframe");
    iframe.style.display = "none";
    iframe.src = this.pdfBlobUrl;
    document.body.appendChild(iframe);
    iframe.contentWindow.print();
  }

  showPdf() {
    this.nativeWindow.open(this.pdfBlobUrl);
  }

  downloadPdf() {
    const fileName = "test.pdf";
    const anchor = document.createElement("a");
    anchor.style.display = "none";
    anchor.href = this.pdfBlobUrl;
    anchor.download = fileName;
    document.body.appendChild(anchor);
    anchor.click();
  }