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)

fromIR: function Mesh_fromIR(raw) {
    
    const coords = raw[2];
    const colors = raw[3];
    const figures = raw[4];
    const bounds = raw[5];
    const matrix = raw[6];
    const bbox = raw[7];
    const background = raw[8];
    return {
      getPattern: function Mesh_getPattern(ctx, owner, shadingFill) {
        applyBoundingBox(ctx, bbox);
        let scale;
        if (shadingFill) {
          scale = Util.singularValueDecompose2dScale(ctx.mozCurrentTransform);
        } else {
          
          scale = Util.singularValueDecompose2dScale(owner.baseTransform);
          if (matrix) {
            const matrixScale = Util.singularValueDecompose2dScale(matrix);
            scale = [scale[0] * matrixScale[0], scale[1] * matrixScale[1]];
          }
        }
        
        
        const temporaryPatternCanvas = createMeshCanvas(
          bounds,
          scale,
          coords,
          colors,