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):

}
      if (this.encrypt && !suppressEncryption) {
        xrefEntry = parser.getObj(this.encrypt.createCipherTransform(num, gen));
      } else {
        xrefEntry = parser.getObj();
      }
      if (!isStream(xrefEntry)) {
        if (
          typeof PDFJSDev === "undefined" ||
          PDFJSDev.test("!PRODUCTION || TESTING")
        ) {
          assert(
            xrefEntry !== undefined,
            'fetchUncompressed: The "xrefEntry" cannot be undefined.'
          );
        }
        this._cacheMap.set(num, xrefEntry);
      }
      return xrefEntry;
    },
    fetchCompressed(ref, xrefEntry, suppressEncryption = false) {
      const tableOffset = xrefEntry.offset;
      const stream = this.fetch(Ref.get(tableOffset, 0));
      if (!isStream(stream)) {
        throw new FormatError("bad ObjStm stream");
      }
      const first = stream.dict.get("First");
      const n = stream.dict.get("N");
      if (!Number.isInteger(first) || !Number.isInteger(n)) {
        throw new FormatError(