Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe98e9c002476a6…

MALICIOUS

PDF

40.7 KB Created: 2020-08-24 18:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8961ed5d38ed382fe11beb3941cc47f9 SHA-1: d92712af071b59a3aa0e6c6224143a2f9b9a5363 SHA-256: 3fe98e9c002476a6328d0cb05c8571d0cb7514b55fe40bca7c0a2b4953cb9640
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=acronis+disk+director+11+full'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm SEO tactic to obscure the malicious intent. No scripts were extracted from this sample.

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=acronis+disk+director+11+full In PDF document text
    • http://files.curiositytransforms.com/uploads/1/3/0/7/130776060/3276090.pdfIn PDF document text
    • http://files.onelegchallenge.org/uploads/1/3/0/7/130775413/newipefogu-nivazutibino-rufevila-zejis.pdfIn PDF document text
    • http://zepuwo.nonstopfunsocal.com/uploads/1/3/0/7/130776433/rasaseguvegab-todopudofubi-nakaxe-kaxuvigetava.pdfIn PDF document text
    • http://files.tobyupci.com/uploads/1/3/0/8/130814784/68b7a0eb.pdfIn PDF document text
    • http://voxakig.porterforcanton.com/uploads/1/3/0/8/130815017/bekoroj.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/1/0447/8740/0864/files/new_antidiabetic_drugs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2906/7933/files/adjectives_exercises_intermediate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/kufukojaforuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/subil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7666/2949/files/75126424900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9347/8814/files/bacon_s_manifesto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8907/5102/files/lokevedopezezerebeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7157/6993/files/critical_path_method_network_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3808/7070/files/baby_boomers_meme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4607/5554/files/200_investment_banking_interview_questions_and_answers.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
🗂 Part of campaign: onelegchallenge.org 3 samples

Related samples 6

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_off000060b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B2 4912 bytes
SHA-256: 0eacbe798cf5657d3d646d1e5bbdbea69f5e3a40275f43c073a1d63aa769ec64
font_01_sfnt_off00007176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7176 11508 bytes
SHA-256: 22c86bb8a6395985557191faa13602c150872f48508419655ba8f2e2e007ed22

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