Attach (recommended) or Link to PDF file here:  [test.pdf](https://akmer.aikucun.com/a94a8fe5ccb19ba61c4c0873d391e987982fbbd3_1616477914120_83.pdf)


Configuration:
- Web browser and its version: chrome 87.0.4280.88
- Operating system and its version: windows10
- PDF.js version: 2.6.347
- Is a browser extension:

Steps to reproduce the problem:
1. just open 

What is the expected behavior? (add screenshot)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/17724610/112087066-473f8f80-8bc8-11eb-8efb-56139ec42a9c.png)

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

url = "/" + url.name;
          } else if (isString(url)) {
            url = addDefaultProtocolToUrl(url);
          }
          
          
          break;
        case "GoTo":
          dest = action.get("D");
          break;
        case "Launch":
        
        
        
        
        case "GoToR":
          const urlDict = action.get("F");
          if (isDict(urlDict)) {
            
            
            url = urlDict.get("F") || null;
          } else if (isString(urlDict)) {
            url = urlDict;
          }
          
          let remoteDest = action.get("D");
          if (remoteDest) {
            if (isName(remoteDest)) {
              remoteDest = remoteDest.name;