MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, contains text suggesting it is a 'business english accounting vocabulary pdf' lure. The presence of a large number of external PDF links, including to potentially benign Shopify URLs, indicates a link farm strategy, likely to obscure the malicious redirector. The ML classifier also strongly indicated maliciousness.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 5
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PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF 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.
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall 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.
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Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINKPDF 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.
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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=business+english+accounting+vocabulary+pdf In PDF document text
- http://duwupose.rayzinkanefarm.com/uploads/1/3/1/4/131408738/jezuvo-pixavoga-vifavutosiv-mexedijisasuled.pdfIn PDF document text
- http://files.sarahcamillewilson.com/uploads/1/3/1/3/131383456/titalafumuwiza.pdfIn PDF document text
- http://files.uaassociation.org/uploads/1/3/2/6/132681026/rilabunorakigipadege.pdfIn PDF document text
- http://dupivu.themainstreetmommy.com/uploads/1/3/0/9/130969744/tetudikikedinu.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/1/0438/4564/8546/files/destin_weather_20_day_forecast.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/8134/3900/files/80174703375.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0406/6967/files/91675092365.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/6944/8097/files/71067740939.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/5670/0319/files/accommodations_and_modifications_for_students_with_disabilities.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/6926/8373/files/28747637867.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/6191/9396/files/81257776519.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/3486/9921/files/kopinovipibufonokim.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/2848/0157/files/78493935526.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/9273/8201/files/87147895337.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/7580/6119/files/topikedagedolimajonu.pdfIn PDF document text
- https://traffic.libsyn.com/bizpod/BEP355-Taxes1.mp3In 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
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00008484.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8484 | 5652 bytes |
SHA-256: a8d361838a784f5ecb3ce4252122ed28154f7a1e432354777bbe1de91ffc39a6 |
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font_01_sfnt_off000097b8.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x97B8 | 10120 bytes |
SHA-256: d9653b289c553d917b508946e186065ffc558c7287cb5930ef64ba5d1839f59c |
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font_02_sfnt_off0000ba5a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBA5A | 4324 bytes |
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361 |
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