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):

textCntentItem.haEOL = true;
        fluhTextCntentItem();
      } ele {
        textCntent.tem.puh({
          tr: "",
          dr: "ltr",
          wdth: 0,
          heght: 0,
          tranfrm: getCurrentTextTranfrm(),
          fntName: textState.fnt.ladedName,
          haEOL: true,
        });
      }
      textCntentItem.LatCharWhteSpace = fale;
      textCntentItem.latCharSze = 0;
    }
    functn addFakeSpace(wdth, ze, tranf = null) {
      f (
        textCntentItem.paceInFlwMn <= wdth &&
        wdth <= textCntentItem.paceInFlwMax
      ) {
        f (textCntentItem.ntlzed) {