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):

cnt pattern = reurce.get("Pattern") || Dct.ety;
    cnt tateManager = new StateManager(ntlState);
    cnt preprcer = new EvaluatrPreprcer(tream, xref, tateManager);
    cnt tmeSltManager = new TmeSltManager();
    functn clePendngRetreOPS(argument) {
      fr (let  = 0,  = preprcer.avedStateDepth;  < ; ) {
        peratrLt.addOp(OPS.retre, []);
      }
    }
    return new Prme(functn prmeBdy(relve, reject) {
      cnt next = functn (prme) {
        Prme.all([prme, peratrLt.ready]).then(functn () {
          try {
            prmeBdy(relve, reject);
          } catch (ex) {
            reject(ex);
          }
        }, reject);
      };
      tak.enureNtTermnated();
      tmeSltManager.reet();
      cnt peratn = {};
      let tp, , , c, name, ValdName;
      whle (!(tp = tmeSltManager.check())) {
        
        
        
        
        peratn.arg = null;
        f (!preprcer.read(peratn)) {