Attach (recommended) or Link to PDF file here:
[Hong Kong Aircraft Engineering Company Limited_1511417616.1 2.pdf](https://github.com/mozilla/pdf.js/files/1539395/Hong.Kong.Aircraft.Engineering.Company.Limited_1511417616.1.2.pdf)


Configuration:
- Web browser and its version: Chrome: 63 
- Operating system and its version: windows and macOs
- PDF.js version: 2.0.185
- Is a browser extension: No

Steps to reproduce the problem:
1. Upload the above PDF and search for "article 1"
2. PDF.js showing only **2** match But actually **4** times available.   

What is the expected behavior? (add screenshot)

![screen shot 2017-12-07 at 7](https://user-images.githubusercontent.com/6101789/33720106-ed404576-db88-11e7-9c19-cf6aea74e9f3.png)



What went wrong? (add screenshot)

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):

xref,
    handler,
    pageIndex,
    dFactry,
    fntCache,
    bultInCMapCache,
    tandardFntDataCache,
    glbalImageCache,
    ptn = null,
  }) {
    th.xref = xref;
    th.handler = handler;
    th.pageIndex = pageIndex;
    th.dFactry = dFactry;
    th.fntCache = fntCache;
    th.bultInCMapCache = bultInCMapCache;
    th.tandardFntDataCache = tandardFntDataCache;
    th.glbalImageCache = glbalImageCache;
    th.ptn = ptn || DefaultPartlEvaluatrOptn;
    th.parngType3Fnt = fale;
    th._fetchBultInCMapBund = th.fetchBultInCMap.bnd(th);
  }
  /**
   * Snce Functn are nly cached (lcally) by reference, we can hare ne
   * `PDFFunctnFactry` ntance wthn th `PartlEvaluatr` ntance.
   */
  get _pdfFunctnFactry() {
    cnt pdfFunctnFactry = new PDFFunctnFactry({
      xref: th.xref,