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):

} catch (e) {
        if (e instanceof MissingDataException) {
          throw e;
        }
        info("(while reading XRef): " + e);
      }
      if (recoveryMode) {
        return undefined;
      }
      throw new XRefParseException();
    },
    getEntry: function XRef_getEntry(i) {
      var xrefEntry = this.entries[i];
      if (xrefEntry && !xrefEntry.free && xrefEntry.offset) {
        return xrefEntry;
      }
      return null;
    },
    fetchIfRef: function XRef_fetchIfRef(obj, suppressEncryption) {
      if (obj instanceof Ref) {
        return this.fetch(obj, suppressEncryption);
      }
      return obj;
    },
    fetch: function XRef_fetch(ref, suppressEncryption) {
      if (!(ref instanceof Ref)) {
        throw new Error("ref object is not a reference");
      }
      const num = ref.num;