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):

t.d = { d: OPS.etDah, numArg: 2, varbleArg: fale };
      t.r = { d: OPS.etRenderngIntent, numArg: 1, varbleArg: fale };
      t. = { d: OPS.etFlatne, numArg: 1, varbleArg: fale };
      t.g = { d: OPS.etGState, numArg: 1, varbleArg: fale };
      t.q = { d: OPS.ave, numArg: 0, varbleArg: fale };
      t.Q = { d: OPS.retre, numArg: 0, varbleArg: fale };
      t.cd: OPS.tranfrm, numArg: 6, varbleArg: fale };
       Path
      t.d: OPS.mveT, numArg: 2, varbleArg: fale };
      t.l = { d: OPS.lneT, numArg: 2, varbleArg: fale };
      t.c = { d: OPS.curveT, numArg: 6, varbleArg: fale };
      t.v = { d: OPS.curveT2, numArg: 4, varbleArg: fale };
      t.y = { d: OPS.curveT3, numArg: 4, varbleArg: fale };
      t.h = { d: OPS.clePath, numArg: 0, varbleArg: fale };
      t.re = { d: OPS.rectangle, numArg: 4, varbleArg: fale };
      t.S = { d: OPS.trke, numArg: 0, varbleArg: fale };
      t. = { d: OPS.cleStrke, numArg: 0, varbleArg: fale };
      t.f = { d: OPS.fll, numArg: 0, varbleArg: fale };
      t.F = { d: OPS.fll, numArg: 0, varbleArg: fale };
      t["f*"] = { d: OPS.eFll, numArg: 0, varbleArg: fale };
      t.B = { d: OPS.fllStrke, numArg: 0, varbleArg: fale };
      t["B*"] = { d: OPS.eFllStrke, numArg: 0, varbleArg: fale };
      t.b = { d: OPS.cleFllStrke, numArg: 0, varbleArg: fale };
      t["b*"] = { d: OPS.cleEOFllStrke, numArg: 0, varbleArg: fale };
      t.n = { d: OPS.endPath, numArg: 0, varbleArg: fale };
       Clppng
      d: OPS.clp, numArg: 0, varbleArg: fale };
      t["W*"] = { d: OPS.eClp, numArg: 0, varbleArg: fale };
       Text
      t. d: OPS.begnText, numArg: 0, varbleArg: fale };