Here are links to some good resources from around the web related to the presence of logical fallacies in advertisements.
Start with this blog post: An English teacher/blogger analyzes fallacies of Super Bowl ads.
Then watch this YouTube video: A student compiled clips and explanations for a class project.
Finally, take a look at these public and reusable Prezis that include several examples: Logical Fallacies Within Advertisements and Logical Fallacies in Advertisements.