MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is likely part of a phishing or malware distribution chain. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on 'static.usrfiles.com'. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector is the primary indicator of compromise.
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=msa+gage+r%2526+r+excel+template
- https://static.usrfiles.com/ugd/76156b_9a5fe4c3698943ab955489ee5d0551ba.pdf
- https://static.usrfiles.com/ugd/b8c837_0eb0e77a0ce34d7fbf99dfe246adae0b.pdf
- https://static.usrfiles.com/ugd/21e6f2_9642bbb27e594a878e2b6e6a508deabe.pdf
- https://static.usrfiles.com/ugd/b8c837_6984533caf8048dcbf6bf888b2e48f69.pdf
- https://static.usrfiles.com/ugd/6c032c_1641f65f81a64840be2e11af1870b3f9.pdf
- https://static.usrfiles.com/ugd/47b1e8_6b3c0512fbc64959af5e2b2c22f5776a.pdf
- https://static.usrfiles.com/ugd/e3ff21_7b71314021b54088a4f06043dd88348b.pdf
- https://static.usrfiles.com/ugd/b8c837_16d63047691748e19d09bcab43da2467.pdf
- https://cdn.shopify.com/s/files/1/0437/6484/2657/files/bokigixususoremasewo.pdf
- https://cdn.shopify.com/s/files/1/0431/5794/6519/files/82637776088.pdf
- https://cdn.shopify.com/s/files/1/0438/0976/7584/files/tusixulubukuvuzupete.pdf
- https://cdn.shopify.com/s/files/1/0432/2702/1480/files/kanukijuwibupeborijasa.pdf
- https://cdn.shopify.com/s/files/1/0429/9577/7699/files/hidden_life_of_the_cell_answer_key.pdf
- https://static.usrfiles.com/ugd/63d3ad_420a67fce55443d5ba27f979139bf2dd.pdf
- https://static.usrfiles.com/ugd/95089d_dbb02961f2654303b5f4f99ca07e2984.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_off000076d0.binc2ded4aa92ed6416487197396b3dab36b06a9eef02b63fe4e1d671db2022e932 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x76D0 | 4828 bytes |
font_01_sfnt_off00008754.bin6e23d859ede302f40dc5470ab204b2e59a5ed4ecbe2ca567627408da1cd6f509 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8754 | 10524 bytes |
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