Attach (recommended) or Link to PDF file here:
[测试文件.pdf](https://github.com/mozilla/pdf.js/files/7147166/default.pdf)

Configuration:
- Web browser and its version:chrome 92.0.4515.131
- Operating system and its [version:](url) windows
- PDF.js version:v2.9.359
- Is a browser extension:no

Steps to reproduce the problem:
1. use pdf.js to open this pdf file
2. incomplete content display


What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/16495895/132935415-2b52322d-561c-4f60-97df-24e4429743ff.png)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/16495895/132935425-e5e6605b-71f5-4065-bb89-5c0fdbe1564b.png)

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):

warn(
              `Lexer_getName: Illegal digit (${String.fromCharCode(ch)}) ` +
                "in hexadecimal number."
            );
            strBuf.push("#", String.fromCharCode(previousCh));
            if (specialChars[ch]) {
              break;
            }
            strBuf.push(String.fromCharCode(ch));
            continue;
          }
          strBuf.push(String.fromCharCode((x << 4) | x2));
        } else {
          strBuf.push("#", String.fromCharCode(ch));
        }
      } else {
        strBuf.push(String.fromCharCode(ch));
      }
    }
    if (strBuf.length > 127) {
      warn(`Name token is longer than allowed by the spec: ${strBuf.length}`);
    } else if (strBuf.length === 0) {
      warn("Name token is empty.");
    }
    return Name.get(strBuf.join(""));
  }
  /**
   * @private
   */
  _hexStringWarn(ch) {