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)

bold = "900";
      } else if (fontObj.bold) {
        bold = "bold";
      }
      const italic = fontObj.italic ? "italic" : "normal";
      const typeface = `"${name}", ${fontObj.fallbackName}`;
      
      
      
      
      let browserFontSize = size;
      if (size < MIN_FONT_SIZE) {
        browserFontSize = MIN_FONT_SIZE;
      } else if (size > MAX_FONT_SIZE) {
        browserFontSize = MAX_FONT_SIZE;
      }
      this.current.fontSizeScale = size / browserFontSize;
      this.ctx.font = `${italic} ${bold} ${browserFontSize}px ${typeface}`;
    }
    setTextRenderingMode(mode) {
      this.current.textRenderingMode = mode;
    }
    setTextRise(rise) {
      this.current.textRise = rise;
    }
    moveText(x, y) {
      this.current.x = this.current.lineX += x;
      this.current.y = this.current.lineY += y;
    }
    setLeadingMoveText(x, y) {