Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6bce731886a78a7…

MALICIOUS

PDF

59.0 KB Created: 2020-12-26 16:39:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 46bfc9c965026161005933d1dd7720ec SHA-1: 6fa47a907a6e3456048628f64f2073615659180f SHA-256: e6bce731886a78a7069074a2d4c9bb2f5841e93a0e442a16b712ae69a25e88fe
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm of external URLs, many of which point to other PDFs hosted on various platforms. The primary URL, 'https://trafffi.ru/wb?keyword=best%20free%20roster%20app%20for%20iphone', suggests a lure related to finding free applications. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and 'PDF_SEO_UTM_REDIRECTOR_LINK' points to a redirector disguised as a download lure. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6609

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffi.ru/wb?keyword=best%20free%20roster%20app%20for%20iphone PDF link annotation
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/8615393.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/jhIAEKQ/parkour_stickman_race_game_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lepitajirel/hjfHfja/free_gun_fire_unknown_survival_battleground_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nibidawe/CjasZdX/bofozevot.pdfIn PDF document text
    • https://cdn.sqhk.co/jafetegupam/gRcibhi/63960565128.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/Lw8hbf8/chicken_gorgonzola_alfredo.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/awPheI3/zedge_ringtones_wallpapers_for_iphone.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/tanovupudose.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/1754145.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/dhgjfhd/fonts_emojis_and_fonts_keyboard_app_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/64653498098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9b90342-15a2-4945-9aea-445b6d5fd84d/izuku_a_un_puissant_quirk_fanfiction.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/acrylic_plastic_sheets_cut_to_size.pdfIn PDF document text

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