Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfdfac86271de853…

MALICIOUS

PDF

51.2 KB Created: 2020-08-18 13:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d20f8b7ca94a6805f0028021f710736d SHA-1: 517b43818fedd8b089069b7d7bff2002f27ad9c2 SHA-256: dfdfac86271de8538231c5b06887c503c3590eda9c2929c30242e27522c3a341
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to external PDFs, masquerading as an answer key. The primary link redirects through a malicious infrastructure at 'ttraff.com', likely to a phishing or malware distribution site. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to manipulate search engine results for malicious purposes.

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.com/pify?keyword=illustrative+mathematics+algebra+1+answer+key In PDF document text
    • http://files.mayacorrigan.com/uploads/1/3/2/7/132740362/2127352.pdfIn PDF document text
    • http://zikiv.grace-hutchison.com/uploads/1/3/0/7/130776647/gibilapidodugudi.pdfIn PDF document text
    • http://pataras.fredwinkowskiillustration.com/uploads/1/3/1/6/131636725/5238303.pdfIn PDF document text
    • http://files.cfuwoshawaanddistrict.com/uploads/1/3/1/6/131606186/367e433f3684c.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/1/0431/5856/9128/files/kokaxuvinaveveforim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6487/6444/files/algorithmic_state_machine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9051/7917/files/xakoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7868051279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/10045455176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4069/3662/files/nufesexubezisejegexiruzuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7985/1414/files/54161382537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/35592986717.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 3

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_off00007b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B15 5432 bytes
SHA-256: 4d89fd6c15ebfb4bd80110c4779c720e9167cb88a5c01250bc4e062ac43e9ddc
font_01_sfnt_off00008d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7D 10628 bytes
SHA-256: f1091c17b0b49a75b1e440ee4e610b448dd855915d08b6b6e348da25423124e6
font_02_sfnt_off0000b1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B1 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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