I'm sorry if it's a duplicate, I found lots of issues with gradients but none of the open ones looks similar.
It's apparently the PDF code `/Matrix [440 0 0 -200 20 220]` (line 44 in both files) that causes the problem.

**Configuration:**
- Web browser and its version: Chrome 54
- Operating system and its version: Windows 10
- PDF.js version: 1.6.343

**Steps to reproduce the problem:**
Open attached files:
[radial.pdf](https://github.com/mozilla/pdf.js/files/610302/radial.pdf)
[linear.pdf](https://github.com/mozilla/pdf.js/files/610300/linear.pdf)

**What is the expected behavior?** (Adobe Reader 11)
![image](https://cloud.githubusercontent.com/assets/17966696/20583379/fa80d780-b1f1-11e6-85d2-62dd6970a08c.png)

**What went wrong?** (mozilla.github.io/pdf.js/web/viewer.html)
Gradients aren't correctly transformed
![image](https://cloud.githubusercontent.com/assets/17966696/20583361/cf5bb8a4-b1f1-11e6-9479-9cc606b41187.png)

const matrix = dict.getArray("Matrix");
  const bbox = Util.normalizeRect(dict.getArray("BBox"));
  const xstep = dict.get("XStep");
  const ystep = dict.get("YStep");
  const paintType = dict.get("PaintType");
  const tilingType = dict.get("TilingType");
  
  
  if (bbox[2] - bbox[0] === 0 || bbox[3] - bbox[1] === 0) {
    throw new FormatError(`Invalid getTilingPatternIR /BBox array: [${bbox}].`);
  }
  return [
    "TilingPattern",
    color,
    operatorList,
    matrix,
    bbox,
    xstep,
    ystep,
    paintType,
    tilingType,
  ];
}
export { getTilingPatternIR, Pattern };