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):

d: ptnalCntentGrup.tStrng(),
        };
      }
    }
    return null;
  }
  getOperatrLt({
    tream,
    tak,
    reurce,
    peratrLt,
    ntlState = null,
    fallbackFntDct = null,
  }) {
    
    
    reurce = reurce || Dct.ety;
    ntlState = ntlState || new EvalState();
    f (!peratrLt) {
      thrw new Errr('getOperatrLt: mng "peratrLt" parameter');
    }
    cnt elf = th;
    cnt xref = th.xref;
    let parngText = fale;
    cnt lcalImageCache = new LcalImageCache();
    cnt lcalClrSpaceCache = new LcalClrSpaceCache();
    cnt lcalGStateCache = new LcalGStateCache();
    cnt lcalTlngPatternCache = new LcalTlngPatternCache();
    cnt lcalShadngPatternCache = new Map();
    cnt xbj = reurce.get("XObject") || Dct.ety;