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):

fileType = "TrueType";
      }
    } else if (isOpenTypeFile(file)) {
      if (composite) {
        fileType = "CIDFontType2";
      } else {
        fileType = "OpenType";
      }
    } else if (isType1File(file)) {
      if (composite) {
        fileType = "CIDFontType0";
      } else {
        fileType = type === "MMType1" ? "MMType1" : "Type1";
      }
    } else if (isCFFFile(file)) {
      if (composite) {
        fileType = "CIDFontType0";
        fileSubtype = "CIDFontType0C";
      } else {
        fileType = type === "MMType1" ? "MMType1" : "Type1";
        fileSubtype = "Type1C";
      }
    } else {
      warn("getFontFileType: Unable to detect correct font file Type/Subtype.");
      fileType = type;
      fileSubtype = subtype;
    }
    return [fileType, fileSubtype];
  }
  function buildToFontChar(encoding, glyphsUnicodeMap, differences) {