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): ?

const transparentCanvas = this.cachedCanvases.getCanvas(
        "transparent",
        width,
        height,
        true
      );
      this.compositeCtx = this.ctx;
      this.transparentCanvas = transparentCanvas.canvas;
      this.ctx = transparentCanvas.context;
      this.ctx.save();
      
      
      this.ctx.transform.apply(this.ctx, this.compositeCtx.mozCurrentTransform);
    }
    this.ctx.save();
    resetCtxToDefault(this.ctx);
    if (transform) {
      this.ctx.transform.apply(this.ctx, transform);
    }
    this.ctx.transform.apply(this.ctx, viewport.transform);
    this.baseTransform = this.ctx.mozCurrentTransform.slice();
    this._combinedScaleFactor = Math.hypot(
      this.baseTransform[0],
      this.baseTransform[2]
    );
    if (this.imageLayer) {
      this.imageLayer.beginLayout();
    }
  }
  executeOperatorList(