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):

};
      tak.enureNtTermnated();
      tmeSltManager.reet();
      cnt peratn = {};
      let tp,
        arg = [];
      whle (!(tp = tmeSltManager.check())) {
        
        
        
        arg.length = 0;
        peratn.arg = arg;
        f (!preprcer.read(peratn)) {
          break;
        }
        textState = tateManager.tate;
        cnt fn = peratn.fn;
        arg = peratn.arg;
        wtch (fn | 0) {
          cae OPS.etFnt:
            
            var fntNameArg = arg[0].name,
              fntSzeArg = arg[1];
            f (
              textState.fnt &&
              fntNameArg === textState.fntName &&
              fntSzeArg === textState.fntSze
            ) {
              break;
            }