Looks like Flash. Could have started in InDesign but there’s some type of third party application at work, also.
BTW, this eBrochure proves that there’s no bad idea unworthy of being copied.
Very unimpressive, IMO.
This ebrochure is produced through a service called zmags. There are plenty of services similar to this, one would create the content in Indesign, most likely export to PDF. Then upload PDF to service provider where it is turned into a flash file with all the bells and whistles of page flip, navigation, etc
There is not much in the way of interactivity except linking to another page. Why couldn't this just be done in InDesign and then exported as an interactive pdf, which has the same level of interactivity and more. Personally, I do like the design