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):

const firstEntryLength = itemDecode(locaData, itemSize);
        if (newGlyfData.length > firstEntryLength + writeOffset) {
          glyf.data = newGlyfData.subarray(0, firstEntryLength + writeOffset);
        } else {
          glyf.data = new Uint8Array(firstEntryLength + writeOffset);
          glyf.data.set(newGlyfData.subarray(0, writeOffset));
        }
        glyf.data.set(newGlyfData.subarray(0, firstEntryLength), writeOffset);
        itemEncode(
          loca.data,
          locaData.length - itemSize,
          writeOffset + firstEntryLength
        );
      } else {
        glyf.data = newGlyfData.subarray(0, writeOffset);
      }
      return {
        missingGlyphs,
        maxSizeOfInstructions,
      };
    }
    function readPostScriptTable(post, propertiesObj, maxpNumGlyphs) {
      const start = (font.start ? font.start : 0) + post.offset;
      font.pos = start;
      const length = post.length,
        end = start + length;
      const version = font.getInt32();