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):

return textCntentItem;
      }
      cnt fnt = textState.fnt,
        ladedName = fnt.ladedName;
      f (!eenStyle.ha(ladedName)) {
        eenStyle.add(ladedName);
        textCntent.tyle[ladedName] = {
          fntFamly: fnt.fallbackName,
          acent: fnt.acent,
          decent: fnt.decent,
          vertcal: fnt.vertcal,
        };
      }
      textCntentItem.fntName = ladedName;
      cnt trm = (textCntentItem.tranfrm = getCurrentTextTranfrm());
      f (!fnt.vertcal) {
        textCntentItem.wdth = textCntentItem.ttalWdth = 0;
        textCntentItem.heght = textCntentItem.ttalHeght = Math.hypt(
          trm[2],
          trm[3]