Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d1398dc9675ce1…

MALICIOUS

PDF

47.6 KB Created: 2020-08-14 07:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 98112a8515184891d90464db2abfcaa7 SHA-1: b3f6d8faf446cb85ff8d4dde181a43110a0f6963 SHA-256: b2d1398dc9675ce10a3edbc5c67dd527fbd758742c8be776bd7a04e6ce3b7010
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wb?keyword=examen%20de%20osteologia%20humana%20pdf'. This URL is likely intended to lead the user to a phishing or malware distribution site. The document also exhibits characteristics of a link farm, with numerous embedded links, many hosted on Shopify, suggesting an attempt to game search engine results or distribute content broadly. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=examen%20de%20osteologia%20humana%20pdf In PDF document text
    • http://files.blacktailtaxidermy.us/uploads/1/3/1/4/131409677/tepawetanilug-nuvusowaluxiluz-vujadogikebub-vevitiwesilonin.pdfIn PDF document text
    • http://ridakakal.richlandpac.com/uploads/1/3/1/4/131406390/970b9098426c021.pdfIn PDF document text
    • http://lukudo.ajaanimations.com/uploads/1/3/1/4/131482975/75b60bc8adfd.pdfIn PDF document text
    • http://files.calebeverett.org/uploads/1/3/0/7/130740221/4358497.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/1/0431/4093/9933/files/gaxabijoxaxeraxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/pimuxupozikerunajoxejagir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9177/1046/files/xigafemefotojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5863/2606/files/86093136757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8509/3281/files/51063710467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/ccna_materials_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1456/9631/files/exceptional_learners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0785/9096/files/51493541573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/94564468524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0654/7352/files/p90x3_workout_schedule_mass.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3822/6085/files/a_deeper_love_inside.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 2

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_off00007a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A82 5384 bytes
SHA-256: 3dddaba602039f934d0eca9960fc75caa4922bd77ab0d22bc3d448b3fef6ff1b
font_01_sfnt_off00008cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBF 11156 bytes
SHA-256: 9ecd7af45c275383fbc30a1e6e2999db3248d21d54d920ee783df7ffa91cf7f5

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