Malicious PDF — malware analysis report

Static analysis result for SHA-256 6652fc463862b175…

MALICIOUS

PDF

46.1 KB Created: 2020-07-25 16:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e730580caf1b694b53ebae0feba764ec SHA-1: 59d6f428575ad94f3d05c01c0695197a9cd00ec5 SHA-256: 6652fc463862b17510d6cbc695ebb571d3cf337026a3aad98af002f50f457772
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, pointing to the URL https://ttraff.ru/pify?keyword=kahoot+it+free. The document body, though heavily obfuscated, contains text related to 'Kahoot it free', suggesting a lure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=kahoot+it+free In PDF document text
    • http://files.elizabethmariephoto.com/uploads/1/3/0/7/130775953/911b0c3e0c09.pdfIn PDF document text
    • http://files.southcarolinapac.org/uploads/1/3/1/3/131380001/nifif.pdfIn PDF document text
    • http://files.usapathwaytomathematics.com/uploads/1/3/1/4/131452783/6138796.pdfIn PDF document text
    • http://files.macbrothersgourmetfoods.com/uploads/1/3/2/6/132680986/sigesekitaxu_kepijanetuxasi.pdfIn PDF document text
    • http://files.lindsayplouffe.com/uploads/1/3/1/4/131454216/sabobikini_julixadofu_vozagati_buzejibu.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/1/0434/5361/2182/files/94472968341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/24936860345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/4620451447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9021/3019/files/89682564287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5039/2984/files/81615402910.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3521/3467/files/98783453408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/xizejikifebupodurosebod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8924/8927/files/zaxemubojeregusulep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7657/3601/files/68735097465.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8907/5102/files/wetovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/gitinewuvatewozelawixarit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/19357320343.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A3 4296 bytes
SHA-256: 73b403a5b30afb390c6276fb5683d7b375da304c6c4e13e91f63b584fe54fd3e
font_01_sfnt_off0000874f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x874F 10576 bytes
SHA-256: a0a80e951d3d7ac55a42b5c2baa354e8298d29719834b071dd4fb89a3db06cb5

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