MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains embedded links that lead to a known malicious redirector infrastructure, disguised as an academic resource. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF links, suggesting a link farm or redirection tactic. The ML classifier strongly indicated maliciousness.
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=biology+answer+key+2019+quarterly
- https://cdn.shopify.com/s/files/1/0434/8228/4194/files/gejafakamu.pdf
- https://cdn.shopify.com/s/files/1/0440/2269/4046/files/inlet_guide_vane_control_compressor.pdf
- https://cdn.shopify.com/s/files/1/0454/3905/8070/files/71709819508.pdf
- https://cdn.shopify.com/s/files/1/0449/9285/6232/files/abrsm_syllabus_overlap_information.pdf
- https://cdn.shopify.com/s/files/1/0433/2378/5370/files/maduxe.pdf
- https://cdn.shopify.com/s/files/1/0435/4372/4186/files/jivujije.pdf
- https://static.usrfiles.com/ugd/a86d68_fbd12066ad87445096d38c08a5522813.pdf
- https://static.usrfiles.com/ugd/40b9e6_965b2773c02f42eb9b60eb21ee5056cd.pdf
- https://static.usrfiles.com/ugd/b8c837_a5dd74ee3ad4427f93df57699b33fe1d.pdf
- https://static.usrfiles.com/ugd/0ad6c7_33bb6ce59c3c49b58fe1d4800a3c6ff3.pdf
- https://static.usrfiles.com/ugd/d01287_18053b764de64d6282046040632053e5.pdf
- https://static.usrfiles.com/ugd/db93e9_e233f31b36194109b531a51c421045fe.pdf
- https://static.usrfiles.com/ugd/b8c837_68c779775dc84d89981327673fac6f1a.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_off00005629.bin977ec855ced708a62420fb8722e7b8bddc0ec3cba915f87a9e2fe102d9ed376d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5629 | 5768 bytes |
font_01_sfnt_off000069fe.bin7c29975aa32fa211559ba0300ccc8a0eedf28b1bec017c093bdb16124bbba250 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x69FE | 10268 bytes |
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