MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body, though obfuscated, contains the same redirector URL, suggesting an attempt to trick users into clicking it for a 'free download'. The ML classifier strongly indicates maliciousness, and the presence of numerous SEO-optimized PDF links points to a link farm strategy.
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/wb?keyword=preterito%20indefinido%20regulares%20ejercicios%20pdf In PDF document text
- http://wutorusi.stylebysooph.com/uploads/1/3/1/1/131164312/9915539.pdfIn PDF document text
- http://sigobofu.terraceminorsoftball.com/uploads/1/3/2/7/132741099/sejafiredar.pdfIn PDF document text
- http://files.yellowrivercalls.com/uploads/1/3/0/8/130874035/7218064.pdfIn PDF document text
- http://konibibaw.alabamacivicchorale.com/uploads/1/3/1/4/131482975/mizikokowizuza.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/1/0437/8640/4000/files/nagapapaziwewixatezipevap.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/2244/9820/files/arpack_tedavisi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/8206/3777/files/44815025875.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/6397/5835/files/88054929949.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/0581/2629/files/vuzegefetuxes.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/9474/6023/files/factoring_trinomials_practice_problems.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/3784/9762/files/a_whole_new_world_twisted_tale.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/8799/5807/files/69773579262.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/1850/0765/files/bimupugemobiziv.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/4437/0594/files/mathematics_for_economists_pemberton.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/3707/3314/files/antiphospholipid_antibody_syndrome_review.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/musuvagexas.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/0221/4046/files/strength_training_anatomy_3rd_edition_download.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
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off000067de.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x67DE | 5400 bytes |
SHA-256: 813e6cfc5a9b8c2640808e88582582f18b07ea040efced5ddc1ef792a9d3dc6e |
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font_01_sfnt_off00007a4f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7A4F | 11312 bytes |
SHA-256: f9415707564da25a94f1e88e016ca563c30a3d9e814f33a0affbe683b1fc7f3e |
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