MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains a large number of embedded links, many of which point to benign educational resources, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=exercicios+sistema+nervoso+com+gabarito+5+ano', suggesting a lure to disguise malicious activity as educational content. 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.cc/wix?keyword=exercicios+sistema+nervoso+com+gabarito+5+ano
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_f04bc6cc14134a9d88ae5f999e61f6dc.pdf
- https://static.usrfiles.com/ugd/b8c837_678b410e24c54e6499218565f5441258.pdf
- https://static.usrfiles.com/ugd/b8c837_f7378adc4b584a5d90ec85cc30d9aa8b.pdf
- https://cdn.shopify.com/s/files/1/0435/6784/1443/files/basic_formula_of_maths.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tanedikefiresemur.pdf
- https://cdn.shopify.com/s/files/1/0432/7833/6165/files/26398734433.pdf
- https://static.usrfiles.com/ugd/b8c837_65a39bf7cc8b4d75bde40997dd21f0ee.pdf
- https://static.usrfiles.com/ugd/b8c837_409c019efa9f4aa28a7a617c0d06b294.pdf
- https://static.usrfiles.com/ugd/b8c837_2dcfd9fb9f47429f95d6340a8be0a926.pdf
- https://static.usrfiles.com/ugd/b8c837_0cb1711f615347d2bd7a0b277cfc7a8f.pdf
- https://static.usrfiles.com/ugd/b8c837_3bfb702965b1477b80a3483ce8996ab9.pdf
- https://static.usrfiles.com/ugd/b8c837_a8c7aa945a4a4a84af789f6961c83760.pdf
- https://static.usrfiles.com/ugd/b8c837_896367473ce44bd59dd3671ef063cd83.pdf
- https://static.usrfiles.com/ugd/b8c837_b5ce2959be1140ceb0e46b680de0cc8e.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_off00006854.bin3ee7286c15ec987cb7f0f652167e2b7cc53ffb583455920d588ec3371b3429a3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6854 | 5436 bytes |
font_01_sfnt_off00007ac7.bin676beace997bb55d62ad22e33e7373fe19c2fc635aa0f70fc14400a9a834d8ff |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7AC7 | 13836 bytes |
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