Thank you for writing. 
https://hgic.clemson.edu/factsheet/philodendron-pothos-monstera/#:~:text=While%20philodendrons%20are%20generally%20pest,philodendrons%20are%20toxic%20if%20eaten.

The picture is a bit out of focus but I am pretty sure these are aphids, https://hgic.clemson.edu/factsheet/common-houseplant-insects-related-pests/

Try neem oil or an insecticidal soap for a week and send me new pictures. 
https://www.thespruce.com/how-to-get-rid-of-aphids-2539837

Thank you for writing back and for the better picture.

I see the webs of spidermites right at the deep crevasse where the stem is attaching to the leaf.  The little white specks and dull appearence are characteristic too.  Spidermites go for indoor plants including philodendron.  Here is a reference.  https://extension.umd.edu/resource/spider-mites-indoor-plants