Attach (recommended) or Link to PDF file here: https://www.recom-power.com/pdf/Powerline-AC-DC/RAC05-K.pdf

Configuration:
- Web browser and its version: Firefox 56.0 (64-bit)
- Operating system and its version: Windows 10 with OS Build 15063.632
- PDF.js version: ?
- Is an extension: Built-in

Steps to reproduce the problem:
1. Open Page

What is the expected behavior? To properly render the first page. 
![image](https://user-images.githubusercontent.com/1151969/31415345-b1504022-add7-11e7-855b-8030a308f7a2.png)

What went wrong? Renders poorly.
![image](https://user-images.githubusercontent.com/1151969/31415363-d8842096-add7-11e7-818d-728c1102891b.png)

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension): ?

this.paintChar(
              accent.fontChar,
              scaledAccentX,
              scaledAccentY,
              patternTransform,
              resetLineWidthToOne
            );
          }
        }
      }
      let charWidth;
      if (vertical) {
        charWidth = width * widthAdvanceScale - spacing * fontDirection;
      } else {
        charWidth = width * widthAdvanceScale + spacing * fontDirection;
      }
      x += charWidth;
      if (restoreNeeded) {
        ctx.restore();
      }
    }
    if (vertical) {
      current.y -= x;
    } else {
      current.x += x * textHScale;
    }
    ctx.restore();
    return undefined;
  }
  showType3Text(glyphs) {