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 (!isCmd(obj, "trailer")) {
        throw new FormatError(
          "Invalid XRef table: could not find trailer dictionary"
        );
      }
      
      
      
      
      
      
      
      
      
      var dict = parser.getObj();
      
      if (!isDict(dict) && dict.dict) {
        dict = dict.dict;
      }
      if (!isDict(dict)) {
        throw new FormatError(
          "Invalid XRef table: could not parse trailer dictionary"
        );
      }
      delete this.tableState;
      return dict;
    },
    readXRefTable: function XRef_readXRefTable(parser) {