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):

var gen = ref.gen;
      var num = ref.num;
      if (xrefEntry.gen !== gen) {
        throw new XRefEntryException(`Inconsistent generation in XRef: ${ref}`);
      }
      var stream = this.stream.makeSubStream(
        xrefEntry.offset + this.stream.start
      );
      const parser = new Parser({
        lexer: new Lexer(stream),
        xref: this,
        allowStreams: true,
      });
      var obj1 = parser.getObj();
      var obj2 = parser.getObj();
      var obj3 = parser.getObj();
      if (obj1 !== num || obj2 !== gen || !(obj3 instanceof Cmd)) {
        throw new XRefEntryException(`Bad (uncompressed) XRef entry: ${ref}`);
      }
      if (obj3.cmd !== "obj") {
        
        if (obj3.cmd.startsWith("obj")) {
          num = parseInt(obj3.cmd.substring(3), 10);
          if (!Number.isNaN(num)) {
            return num;
          }
        }
        throw new XRefEntryException(`Bad (uncompressed) XRef entry: ${ref}`);