Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66b862b07b25dfb…

MALICIOUS

PDF

45.9 KB Created: 2020-08-22 06:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ba072ca32141bc6f685498f505606396 SHA-1: 2e453f2bbdf721ec8da961f5d13f3e4317b3b3b8 SHA-256: c66b862b07b25dfbc5f10598ddb00c10fa176ec1aef2db87153b3cbe702ccac0
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised with a keyword related to educational worksheets. This indicates a social engineering attempt to lure users to malicious infrastructure. The PDF also features a link farm, suggesting an attempt to manipulate search engine results or distribute content widely. No scripts were extracted, but the presence of multiple embedded URLs and the heuristic firings strongly suggest a malicious intent to redirect users to harmful content.

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=ordering+decimals+tenths+and+hundredths+worksheets In PDF document text
    • http://fuwil.soarohio.org/uploads/1/3/0/8/130874113/jabaxosotelibo-mavitudul-volagexijufor.pdfIn PDF document text
    • http://files.labelmediva.com/uploads/1/3/0/9/130969681/7458942.pdfIn PDF document text
    • http://files.pirsig.org/uploads/1/3/1/3/131379320/gifise.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/1/0433/9780/8279/files/space_oddity_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3302/5960/files/bowigaxigodegivivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2323/5232/files/30634725789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4922/0256/files/pedialyte_nutrition_facts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/xenedexujifokugebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0708/0610/files/54854982645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32732230761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7669/7760/files/ledaxiberogabexiwaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8611/0110/files/59653204164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/44592184108.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C87 5420 bytes
SHA-256: ad58f83b1bacc7c28f1ae95c62312da0e11ba54cf730ca4093783c6ad6abc920
font_01_sfnt_off00006ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED3 14660 bytes
SHA-256: d1f9587641c4628a43192143634966c6fbd90cbec64fe99af911f93620c296f7
font_02_sfnt_off00009c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C43 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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