Malicious PDF — malware analysis report

Static analysis result for SHA-256 c365f2944cb3638b…

MALICIOUS

PDF

41.5 KB Created: 2020-08-06 19:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 40b31bb36f1ea7a5830d7b715d491774 SHA-1: c91fba48b60da1e0ea1268a39304c6774a253022 SHA-256: c365f2944cb3638b88af2381275aaa0747b73c23b0ff919aa9d150caae431b76
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, 'https://ttraff.ru/pify?keyword=what+is+polygamy+marriage+pdf', which is part of a link farm designed to attract traffic. The document body, though heavily obfuscated, contains text related to the search query, suggesting a lure to trick users into clicking the malicious links.

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.ru/pify?keyword=what+is+polygamy+marriage+pdf In PDF document text
    • http://gawevelo.kaseandjase.com/uploads/1/3/0/7/130775493/7731967.pdfIn PDF document text
    • http://files.aquestforhealthandpeace.com/uploads/1/3/1/4/131452804/8c8fc569.pdfIn PDF document text
    • http://files.jacquelinetopakian.com/uploads/1/3/1/8/131856476/telaji_nuwuturasojo_seburesin_ziremixigu.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/1/0430/0704/9887/files/96493662316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91146339154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/liwidivotijazawage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5589/6990/files/66186641322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/zadizevasoroz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0851/3432/files/20391000496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/zaferikonofusotar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/61626628738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9360/6048/files/tratamiento_absceso_bartolino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/58525143520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/surge_arrester_working_principle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4441/3350/files/pexufogegaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/files/bekibumijidesubidivugol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/67569439137.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

Related samples 8

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_off0000646b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646B 5568 bytes
SHA-256: 45094e660c7f6374c1c85365f10f2f4c124faadf94d6859282f4da1340d4e9fc
font_01_sfnt_off00007746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7746 9908 bytes
SHA-256: 16d7c84ef29aee4792c43425dd893f7f2edcf0354cc810d4b20c1e269bb23b1a

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