After finding an unattributed poster with CC BY-NC-SA licencing during the Commons Space : Mapping for Transformation activities last year, my interest got triggered. What have I been looking at?
Commons Space at the World Social Forum 2016 2016.wsf.federated.wiki jon.2016.wsf.federated.wiki
Thanks to Michel Bauwens tweeting 
about a medium article that used the image as a cover, which could in turn be uploaded to Google Image search for finding its sources, I have come into posession of the desired resources. Lovely quest!
The author of the poster is María Castelló Solbes .
* high res version in english
* high res version in spanish
* feature in guerrilla translation
* feature in opendemocracy
Local copies of the files have been created and the links added to the Commons Space : Library - Materials Sharing