While NW.js shares many technologies with the Chromium browser, it is not a browser but a type of native wrapper for making desktop apps, and this type of malware would not run in a traditional browser which would never create the necessary API's for things like direct, un-prompted filesystem access. Therefore, browsers (and presumably Adobe Reader, even with a not-so-great track record) are already immune by design.
In fact, your link says it uses a self-extracting RAR file which means the user must run a
.exe file. That
.exe could be anything.