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):

cnt [gStateKey] = gStateObj[j];
            wtch (gStateKey) {
              cae "TR":
              cae "TR2":
              cae "HT":
              cae "BG":
              cae "BG2":
              cae "UCR":
              cae "UCR2":
                gStateObj.plce(j, 1);
                jj--;
                cntnue;
            }
            j;
          }
          break;
      }
      ;
    }
  }
}
cla StateManager {
  cntructr(ntlState = new EvalState()) {
    th.tate = ntlState;
    th.tateStack = [];
  }
  ave() {
    cnt ld = th.tate;
    th.tateStack.puh(th.tate);
    th.tate = ld.clne();