MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, though obfuscated, contains text related to 'exercicios balanceamento de equacoes pdf', suggesting a lure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=exercicios+balanceamento+de+equa%25C3%25A7%25C3%25B5es+pdf, which is linked to a known malicious redirector. 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.ru/pify?keyword=exercicios+balanceamento+de+equa%25C3%25A7%25C3%25B5es+pdf
- http://files.drawingdecentered.com/uploads/1/3/0/8/130874359/dofikijupikuvaj-sazedesisumu.pdf
- http://novedinik.drivegreenlight.com/uploads/1/3/1/4/131453870/sokotadegajobin.pdf
- http://files.valleyliberator.com/uploads/1/3/1/6/131606035/padavosagog.pdf
- https://cdn.shopify.com/s/files/1/0427/5827/5238/files/39692769068.pdf
- https://cdn.shopify.com/s/files/1/0434/7484/5858/files/perizia_econometrica.pdf
- https://cdn.shopify.com/s/files/1/0430/0151/2090/files/87436365128.pdf
- https://cdn.shopify.com/s/files/1/0430/6799/8359/files/77302182713.pdf
- https://cdn.shopify.com/s/files/1/0431/8769/9876/files/zekufatoxo.pdf
- https://cdn.shopify.com/s/files/1/0430/3064/2837/files/4931183801.pdf
- https://cdn.shopify.com/s/files/1/0427/3097/9495/files/5275382561.pdf
- https://cdn.shopify.com/s/files/1/0429/6992/3740/files/sap2020_api_documentation.pdf
- https://cdn.shopify.com/s/files/1/0433/8787/9580/files/28232337233.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00006814.bin9117bbf316fc2ea3b6e817c786b4239c6e639bc9bbc85041159577d557ec1aa5 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6814 | 2864 bytes |
font_01_sfnt_off00007244.bin2febd29b00027627b2f92ab33118293244a9fa17f766953f4c6b7808035ae8e7 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7244 | 5992 bytes |
font_02_sfnt_off00008603.bin977d725236f0258db1a71068b4b88bfb8c901991d7c99814ad5ba18f0e6fdde0 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8603 | 12476 bytes |
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