Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e6a5eb700b0b4f…

MALICIOUS

PDF

43.7 KB Created: 2020-08-08 11:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3ad43f2e30abd38be60cba59940ac2d0 SHA-1: 40a66b16539f8e11952a8c5a02d4566577454e8c SHA-256: 99e6a5eb700b0b4f82d6167b1ee22bdba17e471505fe9e3c8a58535ac29a9c03
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external resources. One of these links, 'https://ttraff.ru/pify?keyword=tout+sur+l+anatomie+humaine+pdf', is identified as a malicious redirector. The document's content, though partially corrupted, appears to be a lure related to human anatomy, likely intended to disguise the malicious nature of the embedded links. The presence of a mass external PDF link farm further supports the malicious intent.

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=tout+sur+l+anatomie+humaine+pdf In PDF document text
    • http://files.ravenswoodfitness.com/uploads/1/3/1/4/131438216/90fbbf1eac0ac7.pdfIn PDF document text
    • http://files.heroesofcolor.com/uploads/1/3/0/7/130776164/ripupa.pdfIn PDF document text
    • http://files.acupuncture4yourhealth.com/uploads/1/3/2/8/132814343/6809803.pdfIn PDF document text
    • http://files.hamdasti.com/uploads/1/3/1/4/131453432/voxagezinupado.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/1/0430/5934/7618/files/wenotapujunukezewav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/chiaki_fan_club.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6957/1233/files/58313841847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8962/3208/files/xinerabowesixit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4031/6319/files/13224629805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/jelimutifezep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/29173743416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0455/9519/files/calcium_oxalate_kidney_stones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/95119657631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0513/1421/files/weedeater_carb_adjustment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/88490257821.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2677/4173/files/ralolazim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0760/4896/files/kipejos.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_off0000696a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x696A 5228 bytes
SHA-256: 7c8d6c97a1b4837da67c559fd3437d7745ed1116a57b80178850edb5a4982e15
font_01_sfnt_off00007b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B03 11652 bytes
SHA-256: a4213466b6cb7ed985b314ba4734fad2bb7bfb8fc186922ce9ab3a36327f73e9

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