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 heavily obfuscated, appears to be related to 'ejercicios resueltos de caida libre fisica pdf', suggesting a lure to attract users searching for educational materials. The ML classifier strongly indicates maliciousness, and the presence of numerous external links points towards a link farm or SEO poisoning attack.
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=ejercicios+resueltos+de+caida+libre+fisica+pdf In PDF document text
- http://files.tuscanrenaissanceacademy.com/uploads/1/3/0/8/130813768/f64f74.pdfIn PDF document text
- http://files.itsnotaboutthesexmyass.com/uploads/1/3/1/4/131407067/wewinesozibuwige.pdfIn PDF document text
- http://files.abrairalab.org/uploads/1/3/2/3/132303012/ligasijaw.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/1/0429/5308/0991/files/40554929977.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/7311/9143/files/dufekaxejabovoranapumaro.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pedarivorenali.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/3698/2952/files/tijidixukoxol.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/1272/6677/files/5840441309.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/6083/0116/files/pikinabakoxebobote.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/1892/7778/files/xoxazixikipakisoliro.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/2656/2722/files/rejad.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3100392900.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/0859/7927/files/dojaxupisikadimi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/0688/6051/files/bogivasib.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/6653/0719/files/35842112105.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/0382/2755/files/nusatiperamitipapuxu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/3482/9222/files/vadigivabepifibibe.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off000078a7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x78A7 | 5100 bytes |
SHA-256: 8fc6f0e236d019434661053faf4d5a6ca2220f515625b70ce9d88b0537ef1c9d |
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font_01_sfnt_off00008a0b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8A0B | 11676 bytes |
SHA-256: 1cee6f3315db099ba8eba04b0c6a4b986dacc9258f6ee2990e21a0248da9a50d |
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font_02_sfnt_off0000afbb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xAFBB | 16232 bytes |
SHA-256: 4df7d432bfacd39d9a4c50cb09915c8cacbf036009741f9c9314eb7fae48a072 |
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