MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains embedded links, one of which, https://ttraff.ru/wix?keyword=arriba+6th+edition+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into clicking it. The presence of numerous other PDF links further indicates a link farm strategy, likely for SEO poisoning or to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious.
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=arriba+6th+edition+pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_f6454569ec054182aca7b573c3613ff6.pdf
- https://static.usrfiles.com/ugd/b8c837_702f50131bac4d9f877ced03cde7340f.pdf
- https://static.usrfiles.com/ugd/b8c837_528edf90f4e54b988b0956dccf9e278c.pdf
- https://static.usrfiles.com/ugd/b8c837_a780ce450f614092ad228dac8e8e6997.pdf
- https://static.usrfiles.com/ugd/b8c837_2ec6fa03b22d487ca22ac3d8f9f580e4.pdf
- https://static.usrfiles.com/ugd/b8c837_0e41bf04d25d40b1af3d2ff4f7f16f33.pdf
- https://static.usrfiles.com/ugd/b8c837_ccdd99dee19742eaaccc7bd74fa3b04f.pdf
- https://static.usrfiles.com/ugd/b8c837_d6dca6c272ab4cadb0beb77fc36308c3.pdf
- https://static.usrfiles.com/ugd/89363e_a824e441028641ff9c0080485c3323c1.pdf
- https://static.usrfiles.com/ugd/b8c837_c2ee0cc9306f4fedadae902f9e2f56ee.pdf
- https://static.usrfiles.com/ugd/b8c837_f71dee7c754c49a1b475d2b705e2bff9.pdf
- https://static.usrfiles.com/ugd/b8c837_88b9ef4220b64299b85ebb8981df6e3a.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/
- http://scripts.sil.org/OFL
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off000062c2.bin3c18fa04c279624ae5bcc6c6b11bbc5a068689f596db7cfa7530d3f293ef05fb |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x62C2 | 5204 bytes |
font_01_sfnt_off00007461.bin79a22903c8a6cf201511661271374177b442f85935a2915e5a82aee08c92fad7 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7461 | 11104 bytes |
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