Malicious PDF — malware analysis report

Static analysis result for SHA-256 c051c4269490dc24…

MALICIOUS

PDF

39.8 KB Created: 2020-08-17 14:41:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a332fb7eb21ab183de9d14d0d42c4d8c SHA-1: c33d1308a2c5796952c461b99e77fcc4418e961e SHA-256: c051c4269490dc24726e242cf052d39102e0549561ce5830637d12c67c1fa28a
134 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for containing a malicious redirector link. The ML classifier also assigned a high probability of maliciousness. The embedded link, 'https://ttraff.ru/pify?keyword=ajax+php+contact+form+with+validation', is the primary indicator of compromise, leading to known malicious infrastructure. The document body, though heavily obfuscated, contains references to the same URL, reinforcing its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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=ajax+php+contact+form+with+validation In PDF document text
    • http://files.comicatcreations.com/uploads/1/3/1/3/131382696/1c0bb75.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/1/0432/2118/8763/files/facebook_ads_guidelines_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/67286189818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/sine_taylor_series.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/20585722097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/gozofubadulojiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4786/1923/files/20932786513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6419/6256/files/occupational_therapy_assessment_tools_for_autism.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 1

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_off00005aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA5 5500 bytes
SHA-256: b5eb70691d70422858a0e466623d763efb283feee587be0f7680473eb329da7c
font_01_sfnt_off00006d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D41 11084 bytes
SHA-256: 9840b5b24a148462d679e77a3f73637b27c9003d5203625cc8f778289ba461ab

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