MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically a URL designed to look like a 'Brainly unlimited answers' link. The document body, though heavily obfuscated, contains the same URL and a list of other PDF links, suggesting a link farm or redirection attempt. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.
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/pify?keyword=brainly+unlimited+answers
- http://files.changemanagementassociates.com/uploads/1/3/1/3/131379894/kasewabu.pdf
- http://files.vegetarianbutcher.org/uploads/1/3/1/1/131164081/ff15420a.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0430/6980/0597/files/jonejefotavopomojek.pdf
- https://cdn.shopify.com/s/files/1/0429/5265/5002/files/xisumorozogabazom.pdf
- https://cdn.shopify.com/s/files/1/0429/3427/2163/files/fapufuxijul.pdf
- https://cdn.shopify.com/s/files/1/0433/3453/3275/files/descargar_diccionario_psicologico.pdf
- https://cdn.shopify.com/s/files/1/0437/4704/9621/files/persona_3_portable_guide.pdf
- https://cdn.shopify.com/s/files/1/0432/0627/9332/files/crash_course_economics_episode_13_answers.pdf
- https://cdn.shopify.com/s/files/1/0430/1144/0803/files/galovemomujubimofofaguki.pdf
- https://cdn.shopify.com/s/files/1/0440/5536/3734/files/58528958728.pdf
- https://cdn.shopify.com/s/files/1/0436/1378/2173/files/gejamiroguba.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00005ada.binda6c859ec5e2936bbe19fa1316b8e17b7c35291c1fd8d0b88014e8ff60da2ac7 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5ADA | 5216 bytes |
font_01_sfnt_off00006c89.binf5a3e0886b95c9b467f99b5e94d28133f575fbf2270330b68ad91cfe8bde1cf1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6C89 | 1884 bytes |
font_02_sfnt_off000075a7.bin7623df972e80c6b3008b1dfb06de585b2f0e64e6c05de64274af69cc03dd73bb |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x75A7 | 10572 bytes |
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