Malicious PDF — malware analysis report

Static analysis result for SHA-256 a781ebe670c05f1c…

MALICIOUS

PDF

45.9 KB Created: 2020-08-11 20:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ee2d3d56c76d2787118cc5775702c4e2 SHA-1: 6ab39283eff9e52434d353dd97835c2f106da97a SHA-256: a781ebe670c05f1c0dee1320c4305277261557ee626643228ff6e798a7a4321d
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=acca+f9+becker+study+text+pdf'. Another critical heuristic indicates a PDF link farm, with many links pointing to shopify.com domains, suggesting an attempt to obscure the true malicious destination. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack pattern is a lure to malicious redirectors.

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=acca+f9+becker+study+text+pdf In PDF document text
    • http://files.gbyws.org/uploads/1/3/2/7/132740285/vinamepuzeg-nefupojinagijux.pdfIn PDF document text
    • http://files.chippewakeryx.org/uploads/1/3/1/4/131410952/562096.pdfIn PDF document text
    • http://files.jarrellfootball.com/uploads/1/3/0/7/130775432/fc43275.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/1/0431/6292/7253/files/wefubomupimina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9372/8159/files/best_ab_workouts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8121/1802/files/fananonizezupezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2778/4103/files/gafadupipevunogixuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/41855225622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0459/6122/files/dugapokixofebiviluve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32878299647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3600/8870/files/25922260817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/vubabonidavimidizu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000618e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618E 5636 bytes
SHA-256: 208a30ba26e3339b5b10517d71fde65449be07c2d72cb0e433a4c09297effc23
font_01_sfnt_off000074c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74C4 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00007d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D52 14712 bytes
SHA-256: 1947e83dec0cde0cf7d30c09f63f2d4636deafb81265b2e50ad79c83ef5a9de2

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