Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bfb1f4a8109c0f7…

MALICIOUS

PDF

49.8 KB Created: 2020-08-05 04:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 780157cbfba771d67332e024a837f909 SHA-1: 56f95cc0d69628aab47e30f4b93659bace37be99 SHA-256: 8bfb1f4a8109c0f75e4576d6a0743fbdd3e7cbbf57df25561d0ffb8a264f3235
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and text 'anti bribery policy pdf', suggesting a lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation to increase visibility. The primary malicious IOC is the redirector URL.

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=anti+bribery+policy+pdf In PDF document text
    • http://files.innovativelearningservices.com/uploads/1/3/0/8/130814132/ladofameluv.pdfIn PDF document text
    • http://files.whitenergroup.biz/uploads/1/3/1/3/131379277/8988f9c382e0.pdfIn PDF document text
    • http://files.mindfulvisionaries.com/uploads/1/3/2/7/132740892/sopovofafikuxe.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/1/0433/4606/7605/files/vekuxatuvulivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/26091603328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0276/9053/files/ian_sommerville_software_engineering_10th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3410/7286/files/ponelogokujodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7831/0295/files/vojufefodikejeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2160/6818/files/tojovibew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1828/8284/files/anaphores_exercices.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2992/0930/files/rapewenelazojetebazeleze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65294746239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7137/3466/files/hover_dynamic_dns.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/fepimiponanixiguserumifi.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_off000084d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D2 4992 bytes
SHA-256: 90b14f971e1917d1d71cea62f218273d2326154d49199b799d504597cbc6755d
font_01_sfnt_off000095e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95E4 10824 bytes
SHA-256: 3490ffbe40ceb4eb57f0cc6d60779b5557ed686b18a820b4a67248d992e9049b

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