MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains embedded links that point to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, contains text related to a 'philately quiz' and the malicious URL itself, suggesting a lure to trick users into clicking the link. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links further supports a malicious intent, likely for SEO poisoning or redirecting to malicious 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=philately+quiz+2019+with+answers
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/20d83a_319ed553d910418ab59616220d4ec654.pdf
- https://static.usrfiles.com/ugd/9e41f0_bd877c9858b94c10be1ee55ddba9d405.pdf
- https://static.usrfiles.com/ugd/e1c37d_87579cf01c654c8b8bc1cc657c016e62.pdf
- https://cdn.shopify.com/s/files/1/0433/9925/0081/files/fumoz.pdf
- https://cdn.shopify.com/s/files/1/0429/9037/0975/files/famous_psychology_case_studies.pdf
- https://cdn.shopify.com/s/files/1/0432/4694/4416/files/74209475242.pdf
- https://cdn.shopify.com/s/files/1/0462/1444/7257/files/76857551941.pdf
- https://cdn.shopify.com/s/files/1/0432/7122/5494/files/gorajo.pdf
- https://static.usrfiles.com/ugd/599f1c_9ed7f0d6403b4b58bbdd4f3903c9a322.pdf
- https://static.usrfiles.com/ugd/b8c837_926c32d8cf9748e6ad86142add143333.pdf
- https://static.usrfiles.com/ugd/10b11f_1e2e9556b7974fbe98233949c946c54f.pdf
- https://cdn.shopify.com/s/files/1/0434/0642/6275/files/98679454456.pdf
- https://cdn.shopify.com/s/files/1/0464/6676/0856/files/financial_accounting_9th_edition_libby.pdf
- https://cdn.shopify.com/s/files/1/0437/7241/2055/files/26045477040.pdf
- https://cdn.shopify.com/s/files/1/0428/5107/4214/files/porifesefetilalenif.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_off00005398.binacbe68b9d517ffd7d9d55faede9bc0413c70ffa521cf0813e47fccdb6593914c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5398 | 5624 bytes |
font_01_sfnt_off000066e3.binf0a07309048fc360c7fe5bfa96338ba5d3dabfa212b128237364c5ccc2ad6de2 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x66E3 | 10308 bytes |
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