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):

FormatError,
  info,
  isNum,
  shadow,
  string32,
  warn,
} from "../shared/util.js";
import { CFFCompiler, CFFParser } from "./cff_parser.js";
import {
  FontFlags,
  getFontType,
  MacStandardGlyphOrdering,
  normalizeFontName,
  recoverGlyphName,
  SEAC_ANALYSIS_ENABLED,
} from "./fonts_utils.js";
import { getDingbatsGlyphsUnicode, getGlyphsUnicode } from "./glyphlist.js";
import {
  getEncoding,
  MacRomanEncoding,
  StandardEncoding,
  SymbolSetEncoding,
  ZapfDingbatsEncoding,
} from "./encodings.js";
import {
  getGlyphMapForStandardFonts,
  getNonStdFontMap,
  getStdFontMap,
  getSupplementalGlyphMapForArialBlack,
  getSupplementalGlyphMapForCalibri,