Malicious PDF — malware analysis report

Static analysis result for SHA-256 66df4910d22403fb…

MALICIOUS

PDF

40.6 KB Created: 2020-08-25 13:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 29dede0afa2cb047d262966f067d8ce9 SHA-1: 8e27f07cb775abe9669f650c483def375088b37e SHA-256: 66df4910d22403fbb175994719fbf3c837a4a9acf4e1fb1db08ed755ad2a8507
202 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service identified as malicious. The document body, though heavily obfuscated, contains text suggesting a lure for "business mathematics and statistics mcqs pdf", paired with a malicious URL. This indicates a phishing attempt to redirect users to potentially 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.cc/pify?keyword=business+mathematics+and+statistics+mcqs+pdf In PDF document text
    • http://wevino.animachristiretreats.org/uploads/1/3/0/7/130776008/4424f.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/1/0433/6818/6015/files/factorio_red_circuit_layout.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1188/9562/files/73074487485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8946/0376/files/nuclear_isomerism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/33591304485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8380/9443/files/osrs_best_place_to_cannon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9639/1323/files/1358954419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/pozasowupuraranus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7366/6213/files/room_agreement_paper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/dugufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4805/8536/files/62283729280.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_off00005f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F18 5440 bytes
SHA-256: bd44ef62c3340f6f53703d6af6b7a3a5cd0d0e785716107398217e2996b86586
font_01_sfnt_off0000716b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x716B 10580 bytes
SHA-256: 0433fccc92fd3914fe4528c650dd61641a1d9e0b5b384ade90e0e1b0b046b4a2

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