Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aeb8a934cc5de2a…

MALICIOUS

PDF

69.1 KB Created: 2020-08-12 09:38:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a3bea1d0df9b411882bc10676a209c19 SHA-1: 2b2bf1713be37b2964258c19b136323abebff284 SHA-256: 4aeb8a934cc5de2ac41f2d8e2813e5be9c693fcf424dfd29fa047c151d01730e
194 Risk Score

Malware Insights

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

The PDF contains a direct link to a known malicious redirector, ttraff.cc, which is disguised with a keyword related to 'appraisal in hrm pdf'. The PDF also features a large number of embedded links, many pointing to benign Shopify domains, but also several to unknown domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to malicious infrastructure via the embedded link.

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.cc/pify?keyword=appraisal+in+hrm+pdf In PDF document text
    • http://laxuxino.thesoundcypher.com/uploads/1/3/1/0/131070161/7265832.pdfIn PDF document text
    • http://files.howellafjrotc.com/uploads/1/3/1/4/131437276/2782318.pdfIn PDF document text
    • http://files.buggybarnmuseum.com/uploads/1/3/1/8/131856772/589dfe1.pdfIn PDF document text
    • http://zaful.jorieberman.com/uploads/1/3/0/9/130969858/xopibego.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/1/0435/6263/1326/files/ashby_material_selection_in_mechanical_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0942/5056/files/electronics_engineering_thesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0210/1923/files/45446236045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/data_structures_and_algorithms_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/potinekodufik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5697/1432/files/wordpress_comments_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8872/2597/files/letujeruvazabivinome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5335/1066/files/20064372653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/7257160790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/rogovevuwabamulemipifuw.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 5

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_off0000c6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BC 4752 bytes
SHA-256: eaa78c2e597dd25d43fe69bbf4ee99c890ea75a1070ef0af081e3ccecf066b59
font_01_sfnt_off0000d683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD683 10192 bytes
SHA-256: f598de972bf4ea2f90cbf272e0961539a19581923c98cadd96298bdf5f10edb9
font_02_sfnt_off0000f947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF947 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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