MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains embedded links, with one prominent URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'plan de estudios' and the malicious URL itself. The presence of a link farm and the ML classifier flagging it as malicious strongly suggest a malicious intent, likely to redirect users to a phishing or malware distribution site.
Machine Learning
- Nyx PDF Classifier malicious score 0.9949
Heuristics 5
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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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Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LUREDocument gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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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=plan+de+estudios+2011+primaria+cuart
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0429/7234/8579/files/manual_lombriz_roja_californiana.pdf
- https://cdn.shopify.com/s/files/1/0433/3250/1656/files/sony_rx100_iii_user_manual.pdf
- https://cdn.shopify.com/s/files/1/0430/8113/8343/files/gaberuje.pdf
- https://cdn.shopify.com/s/files/1/0430/8621/7365/files/36234166385.pdf
- https://static.usrfiles.com/ugd/b8c837_503930efaa134338ab701eb24487daf0.pdf
- https://static.usrfiles.com/ugd/0049ca_bc8bde343ed24cd9a5d99a9b70b31b94.pdf
- https://cdn.shopify.com/s/files/1/0427/9818/6663/files/xatumibev.pdf
- https://cdn.shopify.com/s/files/1/0439/5443/8302/files/detective_conan_last_episode.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_off00016bfc.bind1922ba72833bd184c36589d8bb88c0cbcafdcda27a6ce942ca83303f7f83a6f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x16BFC | 5544 bytes |
font_01_sfnt_off00017ebe.bin7328df6d46ef79b37a8663d8421678e87062d2ca5eefaedf1c0d4631b56254eb |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x17EBE | 11912 bytes |
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