MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is used in conjunction with a keyword suggesting a software download lure. The document body, though heavily obfuscated, also contains this URL and references to 'Crystal disk info download'. The presence of a large number of external PDF links, many hosted on 'static.usrfiles.com', indicates a link farm designed to distribute traffic or host further malicious content.
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=crystal+disk+info+download
- https://static.usrfiles.com/ugd/ef7b09_80a8655d1b9e4273a300c857fb83cbe4.pdf
- https://static.usrfiles.com/ugd/defdb4_4bdf7af4ec144310bf9832860d984710.pdf
- https://static.usrfiles.com/ugd/b8c837_317bc0550ebd4c2b950a42dea582c972.pdf
- https://static.usrfiles.com/ugd/df4650_c627b4b6390a4ffb84112266f3c2e3d2.pdf
- https://static.usrfiles.com/ugd/d5d855_d47970a82d8042bebe85a62c1435c260.pdf
- https://static.usrfiles.com/ugd/41a0b6_30d0b1327057429e853b94eb355e9fe8.pdf
- https://static.usrfiles.com/ugd/96768c_188358738e494dac80474788ee9ef241.pdf
- https://static.usrfiles.com/ugd/b8c837_01d9be52db3f48eb85dce203f68a2ad5.pdf
- https://static.usrfiles.com/ugd/2e4eb4_85f79c1aa13f436f9f986696dadb8072.pdf
- https://static.usrfiles.com/ugd/0df15e_d3ca61b334094c38bbb265940f3637ad.pdf
- https://static.usrfiles.com/ugd/b8c837_9f64b48ba92745fcb58da6a16f35c53d.pdf
- https://static.usrfiles.com/ugd/b8c837_99d81550f2d043c0ae25a9aa20ca5d12.pdf
- https://static.usrfiles.com/ugd/b8c837_aa6cf3ac9bec41c99a191e674a947401.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
stream_005_off000099c2.bin728ae2aebb0cd39e9639bbd27f51ddc3484911b62f33c96fa8d92c6112424af6 |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0x99C2 | 27920 bytes |
font_00_sfnt_off00006624.bin4cabead3caff75dcd2429af9ab5260db71cf7a9fe7d1ae2c4ee9fb82447b29e0 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6624 | 5064 bytes |
font_01_sfnt_off00007784.bin076791a5dd5fe66fa34c2bd3503abdbce8efc37ab6bfd2cbae711f518600b21c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7784 | 9944 bytes |
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