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):

continue;
          }
          startXRefParsedCache[startXRef] = true;
          stream.pos = startXRef + stream.start;
          const parser = new Parser({
            lexer: new Lexer(stream),
            xref: this,
            allowStreams: true,
          });
          var obj = parser.getObj();
          var dict;
          
          if (isCmd(obj, "xref")) {
            
            dict = this.processXRefTable(parser);
            if (!this.topDict) {
              this.topDict = dict;
            }
            
            obj = dict.get("XRefStm");
            if (Number.isInteger(obj)) {
              var pos = obj;
              
              
              if (!(pos in this.xrefstms)) {
                this.xrefstms[pos] = 1;
                this.startXRefQueue.push(pos);
              }
            }
          } else if (Number.isInteger(obj)) {