Malicious PDF — malware analysis report

Static analysis result for SHA-256 c930176fe350db03…

MALICIOUS

PDF

39.6 KB Created: 2020-08-18 15:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3ef45f0b180f253c381a7adc996407ca SHA-1: ea67fa0860a134b834f00351a0fac3baa2c492b5 SHA-256: c930176fe350db0330224cf069cef6350abb5db1c29020e96f910e0e97d8ebbb
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a redirector at ttraff.ru. This behavior is indicative of a link farm or redirection scheme designed to obscure the ultimate destination and potentially lead users to malicious content. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the ttraff.ru URL as malicious. The document body itself is heavily obfuscated and contains the malicious URL, suggesting an attempt to disguise the malicious intent.

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=abrsm+syllabus+overlap+information In PDF document text
    • http://files.airedales4u.com/uploads/1/3/0/7/130776611/8140345.pdfIn PDF document text
    • http://files.texascenterforregionalstudies.net/uploads/1/3/1/8/131856381/29afc.pdfIn PDF document text
    • http://files.nchomeremodel.com/uploads/1/3/0/8/130874042/togijigeboxupev_sobuzo_tirinebeja_mazawe.pdfIn PDF document text
    • http://lojozozeg.oldetownemusic.com/uploads/1/3/0/7/130738524/1880078.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/1/0439/4693/4430/files/tudipekirapeburetisufoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7272/4885/files/tivababumubem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8640/0936/files/the_opportunity_analysis_canvas_for_student_entrepreneurs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6464/6042/files/tofunutexifaziteja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/zuboropupudesalopobuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6995/5486/files/23261918360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0937/4365/files/wikixukero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/google_fi_codes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/voketo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4325/8519/files/54959725804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7350/2361/files/nyc-_210_form_2015.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_off00005e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E01 5340 bytes
SHA-256: d1dc48eb734143e88490688260b9c19b09fd9df3a4a574afe6558099ecc36d0b
font_01_sfnt_off00007018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7018 9876 bytes
SHA-256: 310e0e0ad848e2736a2fa14d5add916e7e9490d028f61c404f6a985f0c39da78

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