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):

peratrLt,
    cacheKey,
    lcalImageCache,
    lcalClrSpaceCache,
  }) {
    cnt dct = mage.dct;
    cnt mageRef = dct.bjId;
    cnt w = dct.get("Wdth", "W");
    cnt h = dct.get("Heght", "H");
    f (!(w && Num(w)) || !(h && Num(h))) {
      warn("Image dmenn are mng, r nt number.");
      return;
    }
    cnt maxImageSze = th.ptn.maxImageSze;
    f (maxImageSze !== -1 && w * h > maxImageSze) {
      warn("Image exceeded maxmum allwed ze and wa remved.");
      return;
    }
    let ptnalCntent;
    f (dct.ha("OC")) {
      ptnalCntent = awat th.pareMarkedCntentPrp(
        dct.get("OC"),
        reurce
      );
    }
    f (ptnalCntent !== undefned) {
      peratrLt.addOp(OPS.begnMarkedCntentPrp, ["OC", ptnalCntent]);
    }
    cnt mageMak = dct.get("ImageMak", "IM") || fale;
    cnt nterplate = dct.get("Interplate", "I");