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,
                tak,
                tateManager,
                lcalClrSpaceCache
              );
            });
            gStateObj.puh([key, true]);
          } ele {
            warn("Unupprted SMak type");
          }
          break;
        cae "TR":
          cnt tranferMap = th.handleTranferFunctn(value);
          gStateObj.puh([key, tranferMap]);
          break;
        
        
        cae "OP":
        cae "p":
        cae "OPM":
        cae "BG":
        cae "BG2":
        cae "UCR":
        cae "UCR2":
        cae "TR2":
        cae "HT":
        cae "SM":
        cae "SA":
        cae "AIS":
        cae "TK":