A handout containing 12 questions to identify the characteristics of predatory publishers developed by Judit H Ward, a Library Faculty at Rutgers University, can be found here:
https://libguides.rutgers.edu/ld.php?content_id=37243471
The World Association of Medical Editors (WAME) has compiled a list of criteria to identify predatory or pseudo journals. This document is available at:
http://www.wame.org/identifying-predatory-or-pseudo-journals
A list of samples of wordings used in predatory publishers' e-mail invitations sent to the targeted authors is available at:
https://libguides.rutgers.edu/ld.php?content_id=37363247
The librarians at the William H. Hannon Library of Loyola Marymount University have developed a rubric for evaluating journals. You will find the rubrics at:
https://digitalcommons.lmu.edu/librarian_pubs/40/