Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ef9295f4be8ea9…

MALICIOUS

PDF

45.5 KB Created: 2020-08-17 00:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6d5de892e3210fbbd2f12bbdc7a33e19 SHA-1: 4cdffe8ce2a701bd57acf55fbdcdb4516cb197f3 SHA-256: b1ef9295f4be8ea9fed12a0b2ad55207d0562c7428401d87559542235163c8a2
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. Another critical heuristic identified a large PDF link farm, suggesting a potential SEO manipulation or content hosting scheme. The document body, though heavily obfuscated, contains references to the malicious redirector URL and several Shopify-hosted PDF files, some of which are confirmed benign while others are unknown. The primary intent appears to be directing users to malicious or manipulative content through a link farm.

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=formal+email+ending+example In PDF document text
    • http://tovar.diasystem.se/uploads/1/3/1/3/131398560/2397298.pdfIn PDF document text
    • http://files.joshuagillingham.ca/uploads/1/3/1/4/131438245/kubada_nosikotolikuniv_woginemu_dagobe.pdfIn PDF document text
    • http://files.counsellingpsychologist.services/uploads/1/3/0/9/130969555/7582248.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0450/9148/7909/files/waluguxizugarebuwizode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/23709541422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4875/4600/files/41849411974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1761/6034/files/36436195187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1370/9722/files/21191366330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3220/5722/files/solving_quadratic_equations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/totuvatenaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/30531309652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5757/0207/files/72656030442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2992/0930/files/this_boy_s_life_by_tobias_wolff.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/hau_bsc_agriculture_entrance_exam_model_question_papers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/saran.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5517/8150/files/81372420726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/97410393846.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000685e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x685E 4832 bytes
SHA-256: e677b817215fef29965e78e554af874980a87ed5e35073f5059c86946285029f
font_01_sfnt_off000078a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A0 10044 bytes
SHA-256: 9b08dec875683613519edf4125de5c98dfbe88e3b688130dc4415b7f161bf6c3
font_02_sfnt_off00009af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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