MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF document was flagged by a machine learning classifier and contains numerous embedded links. One of these links, https://ttraff.ru/wix?keyword=taxonomic+classification+of+bacteria+pdf, points to known malicious redirector infrastructure. The document also exhibits characteristics of a PDF link farm, with many links pointing to static.usrfiles.com, suggesting an attempt to manipulate search engine results or distribute 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=taxonomic+classification+of+bacteria+pdf
- https://static.usrfiles.com/ugd/590778_b95ce70809424e5092a54793f9156c9d.pdf
- https://static.usrfiles.com/ugd/8a419d_fa07f99e85704affbda7f66ea3121978.pdf
- https://static.usrfiles.com/ugd/05900a_1d9497bc47244c689c16c487aa865f1d.pdf
- https://static.usrfiles.com/ugd/3fb742_6c9b47a7e9734d2ebd2491a80bf56ee3.pdf
- https://static.usrfiles.com/ugd/edb4a7_4554b5a003524f30a3edd9616897749c.pdf
- https://static.usrfiles.com/ugd/b8c837_1036b049c496476fa302a3d9a69dcf2a.pdf
- https://static.usrfiles.com/ugd/b8c837_3e917a9ebfc84f4cb7f12620469f7aeb.pdf
- https://static.usrfiles.com/ugd/a31856_88c4bd276b6d48df963358287f731ec0.pdf
- https://static.usrfiles.com/ugd/0511f5_fa08ee0f43fa4ca68949ef141ea23094.pdf
- https://cdn.shopify.com/s/files/1/0430/0007/0307/files/kukoxomalusijiwi.pdf
- https://cdn.shopify.com/s/files/1/0430/9676/8665/files/kayak_pools_midwest.pdf
- https://cdn.shopify.com/s/files/1/0432/2131/9839/files/95407854488.pdf
- https://cdn.shopify.com/s/files/1/0430/3421/4561/files/81496471284.pdf
- https://cdn.shopify.com/s/files/1/0440/5238/1846/files/napevinamozij.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_off000088f9.binafb9f97f8482a385e1b261b033a1e6eb0a8e3245980fe5a424924ac6374ba33d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x88F9 | 5456 bytes |
font_01_sfnt_off00009b6b.binf97c9292a333061012f4753d259124a51504bafd90db5ed83c5b6145ceff15f2 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9B6B | 10868 bytes |
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