Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e581e53ce86492f…

MALICIOUS

PDF

53.3 KB Created: 2020-08-12 09:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f0466fc9775f64dcb2e36b9115b2d2c1 SHA-1: 25fa2b4ea6670f7673ad8e6501b0cc2ec82443fd SHA-256: 2e581e53ce86492f39d14fde46aa59705dabf2da0084f0a79aca95d91f51ba46
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector infrastructure at "https://ttraff.ru/pify?keyword=bennett+mechanical+comprehension+test+pdf+download". Another heuristic indicates a PDF link farm, suggesting an attempt to distribute malicious content or SEO spam. The ML classifier strongly flagged this PDF as malicious. 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=bennett+mechanical+comprehension+test+pdf+download In PDF document text
    • http://wunol.finewatergems.com/uploads/1/3/2/6/132695492/luxukika.pdfIn PDF document text
    • http://files.rebeccaaranyi.com/uploads/1/3/2/7/132740375/suxurudinak.pdfIn PDF document text
    • http://files.carolinerosenblum.net/uploads/1/3/1/3/131379919/39c0a0639.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/1/0440/3511/3110/files/mokonevinulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6111/6064/files/cambridge_igcse_combined_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6589/2261/files/tesobokedar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/68440234156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6742/4412/files/zudimudibanozutugiworet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5745/3985/files/personality_disorders_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4398/7361/files/zakiremeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/munixuxabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2394/9224/files/vasudevan_biochemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8721/7319/files/basic_c_language_programs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8731/4590/files/60096061373.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAA 5324 bytes
SHA-256: 467d9406dcf3bee295c1878b8aebed9a8b468987e9f611bc0570b5ab7955aaec
font_01_sfnt_off00008093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8093 10576 bytes
SHA-256: d969bea91ce9e9429fba5df87aedcd39ff0b2a47a30d66d309845c67c44432b0
font_02_sfnt_off0000a4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4CE 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073
font_03_sfnt_off0000b996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB996 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361