MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF file was identified as malicious due to its inclusion of a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=study+guide+for+nclex+rn+2019', which is flagged as malicious. The presence of a 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic firing further supports this. The file also exhibits characteristics of a link farm, with numerous external PDF links, suggesting an attempt to manipulate search engine results or distribute content through a network of sites.
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=study+guide+for+nclex+rn+2019
- https://cdn.shopify.com/s/files/1/0434/0521/3847/files/89090047913.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdf
- https://cdn.shopify.com/s/files/1/0430/8575/8617/files/9498736298.pdf
- https://cdn.shopify.com/s/files/1/0439/6112/2974/files/pdf_sociologie_du_dveloppement.pdf
- https://cdn.shopify.com/s/files/1/0431/6705/6028/files/35117817586.pdf
- https://cdn.shopify.com/s/files/1/0428/8613/5961/files/soxujukegoru.pdf
- https://cdn.shopify.com/s/files/1/0434/5892/0605/files/2613722707.pdf
- https://static.usrfiles.com/ugd/ade4e6_1dd44ecd223a4140ac04aa12c0b10bf3.pdf
- https://static.usrfiles.com/ugd/d5415a_61f549934fc34e0a9c477e85212a8a39.pdf
- https://static.usrfiles.com/ugd/3b7182_bd7a9d0164ef4366a4abfde0ece71073.pdf
- https://static.usrfiles.com/ugd/0cd019_9967705613c1410d9acce075f382c76e.pdf
- https://cdn.shopify.com/s/files/1/0431/4952/5156/files/27664761408.pdf
- https://cdn.shopify.com/s/files/1/0463/2657/9362/files/android_one_mi_max_2.pdf
- https://cdn.shopify.com/s/files/1/0432/9304/8992/files/nudulonofu.pdf
- https://cdn.shopify.com/s/files/1/0437/4583/7208/files/23741215376.pdf
- https://cdn.shopify.com/s/files/1/0430/4578/1665/files/8541902481.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_off0000927f.binb3b47ec77dcdbcf4ee5b80de45b935526b7711d3e6fb5a64b2f989307fdb8f81 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x927F | 5556 bytes |
font_01_sfnt_off0000a590.bin87edef77fb6f5737b0306f60aba8d0b097bc5fc691413c2bf2fc78c4907ac328 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xA590 | 10916 bytes |
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