MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=horizon+Hz-serie+loopband'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, with the first identified as 'https://static.usrfiles.com/ugd/b8c837_8afe13fc864541279414b3f8f116622f.pdf'. The ML classifier also flagged this PDF as malicious with high confidence.
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=horizon+Hz-serie+loopband
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_8afe13fc864541279414b3f8f116622f.pdf
- https://static.usrfiles.com/ugd/b8c837_41f77f6964174f279e88c00b328106d1.pdf
- https://static.usrfiles.com/ugd/b8c837_4a4f14071a4c426f88c4eb5238b1e70f.pdf
- https://static.usrfiles.com/ugd/b8c837_1f03fe69d3fb4d21b46d1479725aaf1a.pdf
- https://static.usrfiles.com/ugd/6240f8_bdbe9c16a13d45018ed1a5a7c6bc414e.pdf
- https://static.usrfiles.com/ugd/289c5e_da4cac1cdde042d39d6671475dfed138.pdf
- https://static.usrfiles.com/ugd/b65acf_24ac7c1259514ba2bf1e805a2fd9cad0.pdf
- https://static.usrfiles.com/ugd/b8c837_1ce58f5d538e4d24b077562c34caae42.pdf
- https://static.usrfiles.com/ugd/b8c837_b8c4c6b8ac9e40a89c928cd2f02856af.pdf
- https://cdn.shopify.com/s/files/1/0439/1839/3499/files/alliteration_worksheet_for_grade_4.pdf
- https://cdn.shopify.com/s/files/1/0430/8231/7975/files/investigating_biology_lab_manual_8th_edition_answers.pdf
- https://static.usrfiles.com/ugd/b8c837_f60e6bf37bba49bab33a35556f3a8162.pdf
- https://static.usrfiles.com/ugd/b8c837_b86c36ca60e9492c9ac620fe6bc4e91a.pdf
- https://static.usrfiles.com/ugd/b8c837_84a0b93aa568496e8e1fa3454ffecf22.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_off000064d8.bin746cfa3a54e5c64423eed0ee73e80c83744061a87723a27ccd6ab01bb6656a8b |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x64D8 | 5136 bytes |
font_01_sfnt_off00007657.bin258d0c689811a7a2983ca03c31b4e023795128470163c83aac2657ae0f4a400e |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7657 | 14508 bytes |
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