Malicious PDF — malware analysis report

Static analysis result for SHA-256 718bb75812ae7cbc…

MALICIOUS

PDF

52.6 KB Created: 2021-01-10 09:14:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 459077e1b2d7486c8a9a81f63cd8fb8f SHA-1: 716e48df492385d25e17b30aeb67c6de1521f5f3 SHA-256: 718bb75812ae7cbce25de8746c31275e6363b01f325875904221fbea7358fb1e
64 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. The ML classifier also identified the PDF as malicious. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7057

Heuristics 3

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/aws?utm_term=ashraf+ali+thanvi+books PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411919/normal_5f95068c1d990.pdfIn PDF document text
    • https://site-1174448.mozfiles.com/files/1174448/dune_2000_remastered.pdfIn PDF document text
    • https://cdn.sqhk.co/fopalixogul/QVie0x5/gumball_saw_game_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/ehaghhd/vofogavisovipifip.pdfIn PDF document text
    • https://site-1177243.mozfiles.com/files/1177243/50710572852.pdfIn PDF document text
    • https://site-1166674.mozfiles.com/files/1166674/csir_net_syllabus_for_mathematics_2020.pdfIn PDF document text
    • https://site-1174463.mozfiles.com/files/1174463/difabebureweku.pdfIn PDF document text
    • https://cdn.sqhk.co/xufaribo/Hvkxjh1/momifurerupaxeruviwa.pdfIn PDF document text
    • https://site-1234924.mozfiles.com/files/1234924/samsung_video_library.pdfIn PDF document text
    • https://site-1168029.mozfiles.com/files/1168029/the_cw_channel_number.pdfIn PDF document text
    • https://site-1166704.mozfiles.com/files/1166704/download_mcpe_master_apk_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/yhjhcig/dead_ninja_mortal_shadow_2_mod_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/b1hdDhf/rebuild_synonym_and_antonym_dictionary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379615/normal_5fb382933c449.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474739/normal_5ffa5b7121123.pdfIn PDF document text
    • https://cdn.sqhk.co/guxuboru/bjajah6/pubaj.pdfIn PDF document text

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