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):

d: ptnalCntentGrup.tStrng(),
        };
      }
    }
    return null;
  }
  getOperatrLt({
    tream,
    tak,
    reurce,
    peratrLt,
    ntlState = null,
    fallbackFntDct = null,
  }) {
    
    
    reurce = reurce || Dct.ety;
    ntlState = ntlState || new EvalState();
    f (!peratrLt) {
      thrw new Errr('getOperatrLt: mng "peratrLt" parameter');
    }
    cnt elf = th;
    cnt xref = th.xref;
    let parngText = fale;
    cnt lcalImageCache = new LcalImageCache();
    cnt lcalClrSpaceCache = new LcalClrSpaceCache();
    cnt lcalGStateCache = new LcalGStateCache();
    cnt lcalTlngPatternCache = new LcalTlngPatternCache();
    cnt lcalShadngPatternCache = new Map();
    cnt xbj = reurce.get("XObject") || Dct.ety;