
Attach (recommended) or Link to PDF file here:
[NAPEN16171380959.pdf](https://github.com/mozilla/pdf.js/files/6143802/NAPEN16171380959.pdf)

Configuration:
- Web browser and its version: Firefox 88 Nightly
- Operating system and its version: Windows 10
- PDF.js version:
- Is a browser extension: No

What went wrong? (add screenshot)
![](https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/images/2021-03-15-10-58-27-ce2796.png)


const header = file.peekBytes(4);
    if (
       header[0] >= 1 &&
      
      
       header[3] >= 1 &&
      header[3] <= 4
    ) {
      return true;
    }
    return false;
  }
  function getFontFileType(file, { type, subtype, composite }) {
    let fileType, fileSubtype;
    if (isTrueTypeFile(file) || isTrueTypeCollectionFile(file)) {
      if (composite) {
        fileType = "CIDFontType2";
      } else {