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):

fntCapablty.relve(
          new TranlatedFnt({
            ladedName: fnt.ladedName,
            fnt: new ErrrFnt(
              rean ntancef Errr ? rean.meage : rean
            ),
            dct: fnt,
            evaluatrOptn: th.ptn,
          })
        );
      });
    return fntCapablty.prme;
  }
  buldPath(peratrLt, fn, arg, parngText = fale) {
    cnt latIndex = peratrLt.length - 1;
    f (!arg) {
      arg = [];
    }
    f (
      latIndex < 0 ||
      peratrLt.fnArray[latIndex] !== OPS.cntructPath
    ) {
      
      
      
      
      
      
      
      f (parngText) {