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):

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                f (!Stream(xbj)) {
                  thrw new FrmatErrr("XObject huld be a tream");
                }
                cnt type = xbj.dct.get("Subtype");
                f (!Name(type)) {
                  thrw new FrmatErrr("XObject huld have a Name ubtype");
                }
                f (type.name !== "Frm") {
                  etyXObjectCache.et(name, xbj.dct.bjId, true);
                  relveXObject();
                  return;
                }
                
                
                
                
                
                cnt currentState = tateManager.tate.clne();
                cnt xObjStateManager = new StateManager(currentState);
                cnt matrx = xbj.dct.getArray("Matrx");
                f (Array.Array(matrx) && matrx.length === 6) {
                  xObjStateManager.tranfrm(matrx);
                }
                
                
                enqueueChunk();
                cnt nkWrapper = {
                  enqueueInvked: fale,
                  enqueue(chunk, ze) {