Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f65f91ae24fc58…

MALICIOUS

PDF

34.7 KB Created: 2020-08-07 18:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bd7f7425aad829ee2be079a96bcde680 SHA-1: 2304c79e7b06f154046487ca3becacea6a670296 SHA-256: f0f65f91ae24fc5836fc4942fdde0e7e4f141ea77441a2f364cd61faf0ab5f82
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at ttraff.ru. The document body, though heavily obfuscated, contains the text "Brute force attack book pdf" and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly flagged this PDF as malicious.

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=brute+force+attack+book+pdf In PDF document text
    • http://files.mrlibutti.com/uploads/1/3/0/8/130814232/newosujiverifa-susove-lulupe-wipavumojukoga.pdfIn PDF document text
    • http://files.3rdpointproductions.com/uploads/1/3/2/3/132303068/2529dc.pdfIn PDF document text
    • http://vufuwe.goatclean.com/uploads/1/3/1/8/131856584/8538961.pdfIn PDF document text
    • http://panusud.firstaidforall.org/uploads/1/3/1/4/131409090/zomogikima.pdfIn PDF document text
    • http://files.staceysandiegotherapy.com/uploads/1/3/1/8/131871951/8515414.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/1/0434/9594/8454/files/xavojavineragagufar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8826/2821/files/sonupijerevadivasodorul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/roomba_500_series_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/35594802050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2202/3847/files/c_open_directory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3510/6200/files/seturumobowatodevawonib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9562/1786/files/61411191734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2852/7779/files/woxofizipavobosififubuzox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6187/9719/files/bojimani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/an_applied_approach_to_macroeconomics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/el_camino_de_la_kabbalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3293/5574/files/rufaneziluje.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_off00004b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B29 5192 bytes
SHA-256: 04b3ed2b5b14e55b5aa8aab50e75ad2e39c47c32b707b7e91722458ed6fdce48
font_01_sfnt_off00005ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE3 9796 bytes
SHA-256: 2c3410e816268f32d35a446286594c27566d736f425b0004f9b76a0a3464d191

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