Attach (recommended) or Link to PDF file here:  [test.pdf](https://akmer.aikucun.com/a94a8fe5ccb19ba61c4c0873d391e987982fbbd3_1616477914120_83.pdf)


Configuration:
- Web browser and its version: chrome 87.0.4280.88
- Operating system and its version: windows10
- PDF.js version: 2.6.347
- Is a browser extension:

Steps to reproduce the problem:
1. just open 

What is the expected behavior? (add screenshot)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/17724610/112087066-473f8f80-8bc8-11eb-8efb-56139ec42a9c.png)

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):

this.stream = stream;
    this.pdfManager = pdfManager;
    this.entries = [];
    this.xrefstms = Object.create(null);
    this._cacheMap = new Map(); 
    this.stats = {
      streamTypes: Object.create(null),
      fontTypes: Object.create(null),
    };
    this._newRefNum = null;
  }
  XRef.prototype = {
    getNewRef: function XRef_getNewRef() {
      if (this._newRefNum === null) {
        this._newRefNum = this.entries.length;
      }
      return Ref.get(this._newRefNum++, 0);
    },
    resetNewRef: function XRef_resetNewRef() {
      this._newRefNum = null;
    },
    setStartXRef: function XRef_setStartXRef(startXRef) {
      
      
      this.startXRefQueue = [startXRef];
    },
    parse: function XRef_parse(recoveryMode) {
      var trailerDict;
      if (!recoveryMode) {
        trailerDict = this.readXRef();