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)

break;
      case ShadingType.LATTICE_FORM_MESH:
        const verticesPerRow = dict.get("VerticesPerRow") | 0;
        if (verticesPerRow < 2) {
          throw new FormatError("Invalid VerticesPerRow");
        }
        decodeType5Shading(this, reader, verticesPerRow);
        break;
      case ShadingType.COONS_PATCH_MESH:
        decodeType6Shading(this, reader);
        patchMesh = true;
        break;
      case ShadingType.TENSOR_PATCH_MESH:
        decodeType7Shading(this, reader);
        patchMesh = true;
        break;
      default:
        unreachable("Unsupported mesh type.");
        break;
    }
    if (patchMesh) {
      
      updateBounds(this);
      for (let i = 0, ii = this.figures.length; i < ii; i++) {
        buildFigureFromPatch(this, i);
      }
    }
    
    updateBounds(this);
    packData(this);