MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF document was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, with the primary dominant host being 'static.usrfiles.com'. The document body contains garbled text and a URL that appears to be part of the malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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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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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/wix?keyword=ch%25C4%2583m+s%25C3%25B3c+m%25C3%25A8o+b%25E1%25BB%258B+li%25E1%25BB%2587t
- https://static.usrfiles.com/ugd/a64c8c_74ba94a0cb634173a3771c85707ddded.pdf
- https://static.usrfiles.com/ugd/a467d2_dd6a3703f1b84c5cb3f371efaf67b507.pdf
- https://static.usrfiles.com/ugd/b8c837_b5cfaea357d74801a4863968279feb0a.pdf
- https://static.usrfiles.com/ugd/3f80ec_ca32223c9a584b2db0f380826d39561e.pdf
- https://static.usrfiles.com/ugd/0e2875_a2b826625e9144cbb3a3d645079cfa8b.pdf
- https://static.usrfiles.com/ugd/b8c837_c8bb3b6efe8d4c31b864064d81324398.pdf
- https://static.usrfiles.com/ugd/48d9a1_6003df3c498e4c7287fea5756548ab28.pdf
- https://static.usrfiles.com/ugd/576447_3ef7a1cbacb64eba8b86b974a24ae716.pdf
- https://static.usrfiles.com/ugd/e745be_169d62aa48314192b3519cd824d161ed.pdf
- https://static.usrfiles.com/ugd/696b8a_60d0dbc0b5d04b4ab96f9e025e46737a.pdf
- https://static.usrfiles.com/ugd/b8c837_0de6b98e7937454084702c0988b390a3.pdf
- https://static.usrfiles.com/ugd/d2cc1f_9ad820f9ad4542239d15175e1557a50c.pdf
- https://static.usrfiles.com/ugd/6cf392_241f5c9eb00c4c99a8f54fcc77a0475a.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off000059dc.bin5e1ca54a1b6b1b596d06ac89d7e4dcdf9504ac1f31fd0c69771b37d7fa1e5863 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x59DC | 5552 bytes |
font_01_sfnt_off00006bca.bin406fcc304b3002edbc6afd4d6fca5e16974e96d591131eebf4e8de2cb5e41d22 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6BCA | 21896 bytes |
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