Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbfba7659e52ae89…

MALICIOUS

PDF

43.2 KB Created: 2020-08-05 04:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 20140ea52dfef5c31933b3ce169b39c2 SHA-1: 724a2b17ed0023823adf3d031e022341e4ebf5e0 SHA-256: bbfba7659e52ae897eccc773e031f0ef9cc58c5fa721179810574e46ac3a7503
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. The document body, though obfuscated, contains the text 'Kirkpatrick model of curriculum evaluation pdf' and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious.

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=kirkpatrick+model+of+curriculum+evaluation+pdf In PDF document text
    • http://files.juliaberry.org/uploads/1/3/0/7/130775304/tezutu-paxivefi.pdfIn PDF document text
    • http://files.graffitiwgratitude.com/uploads/1/3/0/7/130738814/808e7b1556b9ad.pdfIn PDF document text
    • http://files.judyblakeney.us/uploads/1/3/1/3/131379712/8893932.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/1/0432/2571/0750/files/39689630039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4424/7451/files/manefiwenas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/3830296394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5399/6442/files/15605303751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/anabolisme_catabolisme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/4622688052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9885/6867/files/mafetufubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/encyclopedia_of_chart_patterns.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6700/5333/files/452042771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6202/4605/files/amnagement_du_territoire_cours.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7125/7241/files/vudelul.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_off00006c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5A 5216 bytes
SHA-256: b3f10bfd5a50f3264476b1c4be80c3ca8345dd77b9b9faea75277e623851c5be
font_01_sfnt_off00007e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0C 9828 bytes
SHA-256: 96945b3f72538d9f909bb6bd9c56b6b0caece7a796fd0615e5c565205436ec22

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