Link to PDF file (or attach file here):
[RP_25884_V2_UEL Semi Finals 2016-17_concepts.pdf](https://github.com/mozilla/pdf.js/files/994423/RP_25884_V2_UEL.Semi.Finals.2016-17_concepts.pdf)

Configuration:
- Web browser and its version: Chrome 58, Firefox 53
- Operating system and its version: MacOS 10.11.6
- PDF.js version:
- Is an extension: No

Steps to reproduce the problem:
1.  View the file the file


What is the expected behavior? (add screenshot)
<img width="560" alt="screen shot 2017-05-11 at 2 06 36 pm" src="https://cloud.githubusercontent.com/assets/2474027/25971992/189f4ebe-3653-11e7-8847-c9011984cb8d.png">

What went wrong? (add screenshot)
Textlayer exists here but font fails to render. No warning in the console from what I can see. Maybe related to the gradient?

<img width="637" alt="screen shot 2017-05-11 at 2 06 20 pm" src="https://cloud.githubusercontent.com/assets/2474027/25971997/1b518cc6-3653-11e7-96c0-9a03ffcb7d6e.png">

Thanks!
m[1] * c + m[3] * d,
      m[0] * e + m[2] * f + m[4],
      m[1] * e + m[3] * f + m[5],
    ];
    ctx._originalTransform(a, b, c, d, e, f);
  };
  ctx.setTransform = function ctxSetTransform(a, b, c, d, e, f) {
    this._transformMatrix = [a, b, c, d, e, f];
    ctx._originalSetTransform(a, b, c, d, e, f);
  };
  ctx.resetTransform = function ctxResetTransform() {
    this._transformMatrix = [1, 0, 0, 1, 0, 0];
    ctx._originalResetTransform();
  };
  ctx.rotate = function ctxRotate(angle) {
    const cosValue = Math.cos(angle);
    const sinValue = Math.sin(angle);
    const m = this._transformMatrix;
    this._transformMatrix = [
      m[0] * cosValue + m[2] * sinValue,
      m[1] * cosValue + m[3] * sinValue,
      m[0] * -sinValue + m[2] * cosValue,
      m[1] * -sinValue + m[3] * cosValue,
      m[4],
      m[5],
    ];
    this._originalRotate(angle);
  };
}
class CachedCanvases {