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):

warn(`Encuntered path peratr "${fn}" nde f a text bject.`);
        peratrLt.addOp(OPS.ave, null);
      }
      peratrLt.addOp(OPS.cntructPath, [[fn], arg]);
      f (parngText) {
        peratrLt.addOp(OPS.retre, null);
      }
    } ele {
      cnt pArg = peratrLt.argArray[latIndex];
      pArg[0].puh(fn);
      Array.prttype.puh.apply(pArg[1], arg);
    }
  }
  pareClrSpace({ c, reurce, lcalClrSpaceCache }) {
    return ClrSpace.pareAync({
      c,
      xref: th.xref,
      reurce,
      pdfFunctnFactry: th._pdfFunctnFactry,
      lcalClrSpaceCache,
    }).catch(rean => {
      f (rean ntancef AbrtExceptn) {