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):

this.bold = fontName.search(/bold/gi) !== -1;
      this.italic =
        fontName.search(/oblique/gi) !== -1 ||
        fontName.search(/italic/gi) !== -1;
      
      
      this.black = name.search(/Black/g) !== -1;
      
      this.remeasure = !isStandardFont && Object.keys(this.widths).length > 0;
      if (
        (isStandardFont || isMappedToStandardFont) &&
        type === "CIDFontType2" &&
        this.cidEncoding.startsWith("Identity-")
      ) {
        const GlyphMapForStandardFonts = getGlyphMapForStandardFonts(),
          cidToGidMap = properties.cidToGidMap;
        
        
        const map = [];
        for (const charCode in GlyphMapForStandardFonts) {
          map[+charCode] = GlyphMapForStandardFonts[charCode];
        }
        if (/Arial-?Black/i.test(name)) {
          var SupplementalGlyphMapForArialBlack = getSupplementalGlyphMapForArialBlack();
          for (const charCode in SupplementalGlyphMapForArialBlack) {
            map[+charCode] = SupplementalGlyphMapForArialBlack[charCode];
          }
        } else if (/Calibri/i.test(name)) {
          const SupplementalGlyphMapForCalibri = getSupplementalGlyphMapForCalibri();
          for (const charCode in SupplementalGlyphMapForCalibri) {