Finding PDF search string Upload Link For Any WEbsite

I wanna Know how to findout any website like Edu Site pdf upload link .. Anyone plz A Solution to Search String For findout pdf upload link on this link ..Like this . i want upload this same permalink .. [ https://ec.europa.eu/environment/ecoap/sites/ecoap_stayconnected/files/profile/documents/49b1p7z-free-v-bucks-generator-ps4-xbox-pc-ios-u2f.pdf ]

site:.edu "allowed file types"

Tons Of Thanks @Cool Guy

Cool Guy said:

site:.edu "allowed file types"

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Thank you so much!