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I have seen the same thing on a couple sites. I don't think you have any malware or anything, but rather it is being served up by the sites you are visiting.

You can run this adware removal tool if you like just to check if you want.
 
This little software removed the unnecessary files. Thanks a million bro :)

Edit: I spoke too early :( They still exist.
 
Just figured out that, it's the MacKeeper's pop up coming up.

I didn't download or install mackeeper but its advertisement is poping up.

How can I eliminate this bloody pop-up or advertisement ? Any idea ?

Thanks,
 
Just figured out that, it's the MacKeeper's pop up coming up.

I didn't download or install mackeeper but its advertisement is poping up.

How can I eliminate this bloody pop-up or advertisement ? Any idea ?

Thanks,

Yeah... I see that one once in a while too. It is just a popup ad served by the web site you are visiting. I have popups blocked and run Adblock and they still get through sometimes.
 
This little software removed the unnecessary files. Thanks a million bro :)

Edit: I spoke too early :( They still exist.

When you mentioned this earlier, what files did it find? Did it find anything from Mackeeper or Zeobit?

That b***rd keeps on coming. Even on this page, lol

http://s29.postimg.org/aj25rw7if/Screen_Shot_2014_05_19_at_23_42_17.png

Any help would be much appreciated.

Thanks,

https://getadblock.com

You could also try installing this adblocker extension for Safari. I use this extension and I don't see the ad.
 
In fact, I'm using Adblock Plus and I get that advertisements not only on Safari but also on Chrome and (Under VMWare --> Explorer), too. What a sticky malware it is! :(
 
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