All patients will receive standard of care treatment for their pancreatic cancer. Standard of care treatment will be gemcitabine in combination with nab-paclitaxel given on days 1, 8, and 15 of a 28 day cycle. LOAd703 treatment will be initiated at day 15 of the first cycle and given every other week for 6 doses. Depending on the location of the tumor the injection of LOAd703 can be given in different ways. The most common route of injection is ultrasound-guided percutaneous injection, but endoscopic ultrasound-guidance will be used for some patients as appropriate. All patients will receive anti-anxiety drugs or sedation as needed for comfort during the procedure.