Some hacked websites were redirecting traffic from certain browsers to the BitCoin site, bitcoin.org. Hackers injected malicious code in the.htaccess files of WordPress. The code redirects all visitors with Microsoft Internet Explorer, other. Trident-based browsers (MSIE, Trident), Presto-based. browsers (e.g. some versions of Opera) and iPhone browsers. The malware injects a Flash exploit from book.cube. biz in order to make this crypto-currency more popular.”]
Source: https://blog.sucuri.net/2015/05/hacked-websites-redirect-to-bitcoin-org.html