
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)


suggestedLength - 2 * EEXEC_SIGNATURE.length
      );
      if (block.found && block.length === suggestedLength) {
        return {
          stream: new Stream(headerBytes),
          length: suggestedLength,
        };
      }
    }
    warn('Invalid "Length1" property in Type1 font -- trying to recover.');
    stream.pos = streamStartPos; 
    var SCAN_BLOCK_LENGTH = 2048;
    var actualLength;
    while (true) {
      var scanBytes = stream.peekBytes(SCAN_BLOCK_LENGTH);
      block = findBlock(scanBytes, EEXEC_SIGNATURE, 0);
      if (block.length === 0) {
        break;
      }
      stream.pos += block.length; 
      if (block.found) {
        actualLength = stream.pos - streamStartPos;
        break;
      }
    }
    stream.pos = streamStartPos; 
    if (actualLength) {
      return {
        stream: new Stream(stream.getBytes(actualLength)),
        length: actualLength,