Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf14a6b89c1776ae…

MALICIOUS

PDF

45.8 KB Created: 2020-08-11 20:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 985bbc8d609170faeefb2ee352cedb07 SHA-1: 757d0c6d4a0d272bf8f85a20de28b8aa19060cac SHA-256: bf14a6b89c1776ae980be3738d83dfe7c92fe6b332d2840d9920d3c0fa5b6a7e
194 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.ru'. This suggests a link farm or SEO poisoning tactic to lure users with a fake 'accounting tutorial pdf free download' lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded malicious URL is the primary indicator of compromise.

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=accounting+tutorial+pdf+free+download In PDF document text
    • http://files.ruthscurr.co.uk/uploads/1/3/0/7/130776208/wewuwurifa.pdfIn PDF document text
    • http://files.emilynahrens.com/uploads/1/3/1/3/131380181/nemiwenisilaj_dipobuzilatozi_fonoxojon_sipow.pdfIn PDF document text
    • http://nanubuze.lillipillidental.com/uploads/1/3/0/8/130874284/rajip.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/1/0430/5852/8405/files/rimunovulagedize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/narefiduvemelawetilodozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6702/2239/files/57701360521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6944/6046/files/the_apostolic_ministry_rick_joyner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/pals_pretest_code_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/sixole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/dewesufexip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/19900703215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8624/1187/files/national_commission_for_scheduled_castes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/79586330314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/filizovanaselizidomipad.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE7 5224 bytes
SHA-256: 6c65fea3635a3b86efe8a7eb521a5525a7145283436f4a7116560cf111e67673
font_01_sfnt_off000070cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70CD 10672 bytes
SHA-256: 856d02624c37055b9d282e555a4720390f4f6f10a822591969bcec322ba1061e
font_02_sfnt_off00009565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9565 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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