Hotlinked JPG Image Showing Google Ad

I hotlinked to an image as a test on localhost to see what an advert would look like. What came back was a Google advert in Flash??? How is this possible? Even when I view source, this is what I see:

        
       <div class="bottomAdvert">
            <h2>JOBS</h2>
            <img src="http://website/image.jpg" alt="THE JOBS PORTAL ADVERT" />
        <!-- .bottomAdvert --></div>

HTML:

There's not even 1 piece of Javascript on the website and the ad I'm seeing is definitely in Flash, how are they serving this? Is this a potential security issue?

 

Just a little update. The first thing that sprung to mind was stenography but I don't think this is the case as what's being rendered on the screen is definitely Flash but the file is too small for it to be Flash @ 53.5KB. I decided to view the source of the image, and interestingly I see this:

 ÿØÿáExifII*ÿìDucky
Uÿá+http://ns.adobe.com/xap/1.0/ ÿîAdobedÀ
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Code (markup):

XAP, never heard of it but with it being an Adobe product... I had to have a look at what this was and ended up with this Wiki:

http://en.wikipedia.org/wiki/Extensible_Metadata_Platform]Source[/url]

So it is possible to embed a Flash code into the Meta Data of your images and display your Google ads instead of a stolen image? Wow...

 

It was a Chrome extension