Coding and social engineering techniques that spammers and malware purveyors have been refining and perfecting in the email realm over the past several years couldn t mesh more smoothly into the world of social network messaging. Twitter has popularized the use of shortened URLs to enable users to point to Web pages in messages limited to 144 characters. Twitter, in particular, has extended this veil of assumed trustworthiness to third party software developers, encouraging them to create cool add-on applications. Security experts expect a repeat of the pattern we ve seen with corrupted email spam and tainted websites.
Source: https://threatpost.com/tainting-twitter-070709/72917/