Malicious PDF — malware analysis report

Static analysis result for SHA-256 deaacd9bd5b8f58a…

MALICIOUS

PDF

40.9 KB Created: 2020-08-12 05:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b1fd361adf0d46d68832e4c67e5bfa81 SHA-1: d176cd6b0ce3faae31a356a526fc4f2544ec35e6 SHA-256: deaacd9bd5b8f58ad4a01c21a40bf204934a2597d4e453b277f84aa93401c6b6
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Genetics worksheet pdf answers' and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly supports the malicious verdict.

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=genetics+worksheet+pdf+answers In PDF document text
    • http://files.pacref.com/uploads/1/3/1/4/131483002/7621381.pdfIn PDF document text
    • http://vopegagij.sillycvs.co.uk/uploads/1/3/1/3/131398547/xawobe.pdfIn PDF document text
    • http://files.julescritchinson.com/uploads/1/3/2/6/132681556/4994332.pdfIn PDF document text
    • http://files.irvingtonfbla.org/uploads/1/3/1/3/131380901/6091119.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/1/0430/4447/0938/files/jewofijakonobudiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/pibotetudaganujigikun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4394/5628/files/jogojifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2891/4087/files/esquema_de_vacunacion_antirrabica_humana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0635/9714/files/63147048203.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1139/8039/files/canara_bank_net_banking_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4772/1882/files/42351490976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3532/8661/files/46198328862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3804/7388/files/4391345731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/nojukibaxesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/bach_bourree_guitar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0133/0339/files/76833355984.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_off000061ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AD 5400 bytes
SHA-256: ca7425c6c9f25fc247a8895b59badd2ce31d5aec29223ae86a11592cb9296eb0
font_01_sfnt_off00007420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7420 10132 bytes
SHA-256: 8e8a3a6503a29ba923f3ae5bc2c49e9c83df24e095756b97b02123e1612fcaec

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