Advertising on PDF by Adobe and Yahoo!

Adobe and Yahoo! Unveil Beta Of New Advertising Service For PDF Publishers

How it Works
To join the program, publishers must register online, and then simply upload their Adobe PDF content so that it can be ad-enabled before distributing PDFs as they do today. Ads can only be displayed within Adobe Reader and Adobe Acrobat, in a panel adjacent to the content so that they do not disrupt the viewing experience. Every time the PDF content is viewed, contextual ads are dynamically matched to the content of the document. The publisher can then monitor performance through detailed reports. Publishers already committed to participating in the Ads for Adobe PDF Powered by Yahoo! beta program include: IDG InfoWorld, Wired, Pearson's Education, Meredith Corporation, Reed Elsevier and many more.

PDFに内容に一致した（コンテンツと連動した）広告のサービスをAdobeとYahoo!がやるとのこと。最初はbeta版で、beta programに参加するのはIDG、Wired等。サンプル・イメージにあるように、文書の右側に広告が出ています。これをクリックするとサイトに飛べるようになっています。