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):

properties.seacMap = seacMap;
      }
      var unitsPerEm = 1 / (properties.fontMatrix || FONT_IDENTITY_MATRIX)[0];
      var builder = new OpenTypeFileBuilder("\x4F\x54\x54\x4F");
      
      builder.addTable("CFF ", font.data);
      
      builder.addTable(
        "OS/2",
        createOS2Table(properties, newMapping.charCodeToGlyphId)
      );
      
      builder.addTable(
        "cmap",
        createCmapTable(newMapping.charCodeToGlyphId, numGlyphs)
      );
      
      builder.addTable(
        "head",
        "\x00\x01\x00\x00" + 
          "\x00\x00\x10\x00" + 
          "\x00\x00\x00\x00" + 
          "\x5F\x0F\x3C\xF5" + 
          "\x00\x00" + 
          safeString16(unitsPerEm) + 
          "\x00\x00\x00\x00\x9e\x0b\x7e\x27" + 
          "\x00\x00\x00\x00\x9e\x0b\x7e\x27" + 
          "\x00\x00" + 
          safeString16(properties.descent) + 
          "\x0F\xFF" +