https://gist.github.com/zhufenggood/7bb040b1effb71d14bcc
Here is deobfuscate version using http://jsbeautifier.org/
https://gist.github.com/zhufenggood/6a38c2a2b2185977b3cb
Github notice that, it replace that DDOS http request respond with a alert("WARNING: malicious javascript detected on this domain").
That is why some Chinese guy gets a weird pop-up with English text when visiting Chinese websites