Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f9b3648963f650f…

MALICIOUS

PDF

38.5 KB Created: 2020-08-28 16:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2a56400abdb12c4057b8fbdcd1651192 SHA-1: 50b30d1542e91e8bc01c20bcb59ef30457fe4ae6 SHA-256: 8f9b3648963f650f25984ee8be328231a3ae49c8002159e268c216951a2f5c92
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body text, though obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=the+rational+male+volume+2+pdf', suggesting a lure to download further content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ttraff.cc/pify?keyword=the+rational+male+volume+2+pdf In PDF document text
    • http://files.urinalvinyl.com/uploads/1/3/1/8/131856624/poxipuvifasuv.pdfIn PDF document text
    • http://files.amysommerville.com/uploads/1/3/0/8/130874339/9087114.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/pufoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/vitekozil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8871/files/norajas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6839/1591/files/non_ruminant_animal_production.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5598/6326/files/pilumabakaledaxuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/2708/3943/files/79872491685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6719/6063/files/65849737467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0780/9448/files/531513978.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/cristianismo_puro_e_simples_download_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/zubulukixepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6889/8976/files/cardiomyopathie_hypertrophique_forme_apicale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8394/7427/files/84510277098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4092/3048/files/dbt_workbook_for_borderline_personality_disorder.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
🗂 Part of campaign: amysommerville.com 3 samples

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A49 5244 bytes
SHA-256: 2f18a20b8dbeb2243d0e240504acd255f970b84ecd0f040f7f82a4519e5a0fc9
font_01_sfnt_off00006bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFF 9816 bytes
SHA-256: 62fd86cfd87db7a2933e955ee9795497210ab8e40ee37d2fa466e7ffcd809791

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