Malicious PDF — malware analysis report

Static analysis result for SHA-256 254fdceaa99cd9a5…

MALICIOUS

PDF

32.6 KB Created: 2020-10-14 08:35:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dcc44ad16168b5df9d7310a931ef5de SHA-1: 5c30e28a1470a58064e05e067eeb18d471d77a1e SHA-256: 254fdceaa99cd9a523a614ec79ab17e92def50d5702b3e2b8875830d2be7ca28
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links, https://ggtraff.ru/strik?keyword=manualidades+faciles+de+papel+para+navidad, is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/strik?keyword=manualidades+faciles+de+papel+para+navidad
    • https://site-1037283.mozfiles.com/files/1037283/korikorafip.pdf
    • https://site-1038614.mozfiles.com/files/1038614/26821796504.pdf
    • https://site-1037101.mozfiles.com/files/1037101/bofufarelekoxet.pdf
    • https://site-1043928.mozfiles.com/files/1043928/81970495114.pdf
    • https://site-1038455.mozfiles.com/files/1038455/13355664396.pdf
    • https://site-1038851.mozfiles.com/files/1038851/nulijugudij.pdf
    • https://site-1036661.mozfiles.com/files/1036661/fipumivifupofekif.pdf
    • https://cdn.shopify.com/s/files/1/0492/4188/2780/files/ryobi_gas_trimmer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/4060/2269/files/79614305247.pdf
    • https://cdn.shopify.com/s/files/1/0429/8188/4067/files/51276772986.pdf
    • https://cdn.shopify.com/s/files/1/0485/3107/9323/files/abby_cadabby_birthday_outfit.pdf
    • https://cdn.shopify.com/s/files/1/0457/6110/1980/files/can_you_play_pokemon_tcg_on_chromebook.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/who_invented_alcohol_thermometer.pdf

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