Print multiple document to one single pdf

So I have a process where I download multiple signed documents with a certificate from a server. These pdf’s do not allow for me to combine them into one pdf. However, I can combine them into a portfolio, then print them into a flattened .pdf via a pdf printer. I can now combine all the .pdf’s into one document. Leaving them as a portfolio is unacceptable. Also, I am using adobe pro DC. Is there a script that will do this whole process? It is time consuming and seems like something that could be handled with code.