Malicious PDF — malware analysis report

Static analysis result for SHA-256 381bbb29d8bb5c9a…

MALICIOUS

PDF

99.8 KB Created: 2020-08-07 06:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 293490ab75da2e70f1e278e047b18827 SHA-1: cff6402ce7acd694eb28e970e3fbd9609ae695bd SHA-256: 381bbb29d8bb5c9a61623f89b92e25dab8c3cc59aacf0cbd4267b72e0cd61edb
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a critical heuristic due to a link to known malicious redirector infrastructure. It also contains a large number of external PDF links, characteristic of SEO poisoning techniques. The embedded URL points to 'ttraff.ru', which is associated with malicious redirects. The document body contains text related to the embedded URL's keyword, suggesting a lure.

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=in+search+of+lost+time+pdf+file In PDF document text
    • http://files.frocksunderground.com/uploads/1/3/1/1/131164552/408435.pdfIn PDF document text
    • http://files.bluelotusbeadwork.com/uploads/1/3/2/8/132816195/nemidi_zovikiwidezor_fizoxa_talejakif.pdfIn PDF document text
    • http://zojokiz.knutsonconsulting.com/uploads/1/3/1/4/131406717/4e75ee8a274f01.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/1/0434/4607/5554/files/nobanukuvokigajavutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7709/8913/files/bass_booster_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/fodami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/wakasakamibenikujibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4551/7469/files/zimenafifonemuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5325/2757/files/30187910405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2754/5757/files/zuveme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6634/3072/files/navy_seal_training_guide_mental_toughness.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9289/2053/files/mewazalemulasipovavuwol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4079/5806/files/counting_numbers_worksheet_for_kindergarten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3630/2750/files/standard_form_slope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/banolov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/tovuguvemarapeduja.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_off00014c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C9A 5332 bytes
SHA-256: 88f8f4fa450c2d1176e588ece3d4f670c5de772650d1d54e813fd367d9d98486
font_01_sfnt_off00015e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E93 10152 bytes
SHA-256: 49f9dcffceafa891777c3509079625a11979d3f08e17779a15f7aa1938e4ad27

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