Attach (recommended) or Link to PDF file here:
https://www.nta.go.jp/taxes/tetsuzuki/shinsei/annai/joyaku/annai/pdf2/250.pdf

Configuration:
- Web browser and its version: Firefox 81.0a1
- Operating system and its version: Debian 5.6.7-1
- PDF.js version: latest in Firefox nightly
- Is a browser extension: No

Steps to reproduce the problem:
1. Open the pdf and paste the following text "本 店 又 は 主 た る 事 務 所 の 所 在 地" in "Full name" and in "Domicile and residence" textfields
2. Print or Save the pdf 

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/91207547-30f05480-e709-11ea-9abd-2af5d970dc46.png)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/91207663-69902e00-e709-11ea-8a1d-1ddd30cf0621.png)

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):

).then(({ data }) => {
        ta.annotationType).toEqual(AnnotationType.LINE);
        ta.lineCoordinates).toEqual([1, 2, 3, 4]);
        done();
      }, done.fail);
    });
  });
  describe("FileAttachmentAnnotation", function () {
    it("should correctly parse a file attachment", function (done) {
      const fileStream = new StringStream(
        "<<\n" +
          "/Type /EmbeddedFile\n" +
          "/Subtype /text#2Fplain\n" +
          ">>\n" +
          "stream\n" +
          "Test attachment" +
          "endstream\n"
      );
      const parser = new Parser({
        lexer: new Lexer(fileStream),
        xref: null,
        allowStreams: true,
      });
      const fileStreamRef = Ref.get(18, 0);
      const fileStreamDict = parser.getObj();
      const embeddedFileDict = new Dict();
      embeddedFileDict.set("F", fileStreamRef);
      const fileSpecRef = Ref.get(19, 0);
      const fileSpecDict = new Dict();
      fileSpecDict.set("Type", Name.get("Filespec"));