Malicious PDF — malware analysis report

Static analysis result for SHA-256 957bc7816d3cafc4…

MALICIOUS

PDF

47.1 KB Created: 2020-12-26 23:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 1864c495a79e1f4484fc1961a2804a97 SHA-1: 9214dad39e19019424835c9e5b492a79474683d7 SHA-256: 957bc7816d3cafc490fcfd66945c5f808154b81bfc41ba42b08e30cc05721555
192 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to custom shirts, which is likely intended to deceive the user into clicking the embedded link. This link redirects to malicious infrastructure, as indicated by multiple heuristic firings and the ClamAV detection. The ML classifier also flagged the document as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7569

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://cctraff.ru/strik?utm_term=like+father+like+son+custom+shirts In PDF document text
    • https://cdn.sqhk.co/denobafopum/jjghegi/how_to_choose_the_best_color_lipstick.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f880146d3059.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/jalaQxR/15595255521.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488335/normal_5fd9dced5d603.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/44594995876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4306ddd0-c988-48d0-a693-a31d9660b0aa/dibesexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d11ce57-9c7f-44e5-bddf-9bb31581520a/dark_sun_campaign_setting_3.5.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/surf_city_elementary_school_hampstead_nc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c88cbe4-f5fb-4313-a3f3-9d1ac2730616/ziwejavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/791f6287-c5ee-41af-9998-3cd6d88b5e21/walozifelaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b25b5c7f-d9e9-411b-9979-798125ca2b07/jukugidozogabomawez.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/64838444935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edc7298a-f2d1-4a71-bd83-5e14637dcf03/47769945859.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/20247499336.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/beethoven_symphony_9_2nd_movement_sheet_music.pdfIn PDF document text

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