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 (
              !Number.isInteger(parser.getObj()) ||
              !isCmd(parser.getObj(), "obj") ||
              !isStream((obj = parser.getObj()))
            ) {
              throw new FormatError("Invalid XRef stream");
            }
            dict = this.processXRefStream(obj);
            if (!this.topDict) {
              this.topDict = dict;
            }
            if (!dict) {
              throw new FormatError("Failed to read XRef stream");
            }
          } else {
            throw new FormatError("Invalid XRef stream header");
          }
          
          obj = dict.get("Prev");
          if (Number.isInteger(obj)) {
            this.startXRefQueue.push(obj);
          } else if (isRef(obj)) {
            
            
            this.startXRefQueue.push(obj.num);
          }
          this.startXRefQueue.shift();
        }
        return this.topDict;