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):

break; 
          }
          offset++;
          skipped++;
        }
        return skipped;
      }
      var objRegExp = /^(\d+)\s+(\d+)\s+obj\b/;
      const endobjRegExp = /\bendobj[\b\s]$/;
      const nestedObjRegExp = /\s+(\d+\s+\d+\s+obj[\b\s<])$/;
      const CHECK_CONTENT_LENGTH = 25;
      var trailerBytes = new Uint8Array([116, 114, 97, 105, 108, 101, 114]);
      
      var startxrefBytes = new Uint8Array([115, 116, 97, 114, 116, 120, 114,
                                           101, 102]);
      const objBytes = new Uint8Array([111, 98, 106]);
      var xrefBytes = new Uint8Array([47, 88, 82, 101, 102]);
      
      this.entries.length = 0;
      var stream = this.stream;
      stream.pos = 0;
      var buffer = stream.getBytes();
      var position = stream.start,
        length = buffer.length;
      var trailers = [],
        xrefStms = [];
      while (position < length) {
        var ch = buffer[position];
        if (ch === TAB || ch === LF || ch === CR || ch === SPACE) {
          ++position;