Attach (recommended) or Link to PDF file here:

Configuration:
- Web browser and its version: Chrome 63.0.3239.132 
- Operating system and its version: Windows 10
- PDF.js version: using your official demo project
- Is a browser extension: No

Steps to reproduce the problem:
1.  Just load attached pdf
2.

What is the expected behavior? (add screenshot)
[E-WG18_105147.pdf](https://github.com/mozilla/pdf.js/files/1634833/E-WG18_105147.pdf)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/29802177/34986271-3ca71a5c-fab7-11e7-95e8-1739dda3cd04.png)

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

th.handler,
        th._pdfFunctnFactry,
        lcalClrSpaceCache
      );
      cnt patternIR = hadngFll.getIR();
      d = `pattern_${th.dFactry.createObjId()}`;
      lcalShadngPatternCache.et(hadng, d);
      th.handler.end("bj", [d, th.pageIndex, "Pattern", patternIR]);
    }
    return d;
  }
  handleClrN(
    peratrLt,
    fn,
    arg,
    c,
    pattern,
    reurce,
    tak,
    lcalClrSpaceCache,
    lcalTlngPatternCache,
    lcalShadngPatternCache
  ) {
    
    cnt patternName = arg.pp();
    
    f (patternName ntancef Name) {
      cnt rawPattern = pattern.getRaw(patternName.name);
      cnt lcalTlngPattern =
        rawPattern ntancef Ref &&