Warning: The method presented here is not the official method but a quick patch created in preparation of the official method.
Note: This method only works on Firefox, Chrome and Safari
1. Navigate to http://tampermonkey.net/
2. Click on the first Download button (and then Add extension)
3. Navigate to http://shuple.com/pdf.user.js
4. Click on install
5.
Navigate to the list of Ready for Sharing or Published domestic offers on iaeste.net
Navigate to the tab of Available offers foreign offers on iaeste.net
6. Select the offers you wish to download. (Please note it's only possible to select the offers listed on one site. In case you want to download as many offers as you can at once, please adjust your settings as described here.)
7. Click on Batch PDFs Download