MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'rewriting equations in slope intercept form worksheet', suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports a malicious distribution or phishing campaign.
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=rewriting+equations+in+slope+intercept+form+worksheet
- https://static.usrfiles.com/ugd/b8c837_e26fdb7c845846f9941cd61456e8736b.pdf
- https://static.usrfiles.com/ugd/b8c837_892d3fbbb69d41a09f1340ce68271130.pdf
- https://static.usrfiles.com/ugd/b8c837_0e71cea722cf4ea78dcae4d1e74e6b91.pdf
- https://static.usrfiles.com/ugd/b8c837_f3b7e6ba1dcd4a3a8e9da07b81913988.pdf
- https://static.usrfiles.com/ugd/b8c837_b7566470a67f4d2f9b2a0e6f8c7a8f65.pdf
- https://cdn.shopify.com/s/files/1/0434/4384/7328/files/ielts_reading_practice_academic_2018.pdf
- https://cdn.shopify.com/s/files/1/0434/5056/4773/files/rent_agreement_format_pune_in_marathi.pdf
- https://static.usrfiles.com/ugd/a76634_1e952ce78c27431cb0b8109d37decb24.pdf
- https://static.usrfiles.com/ugd/b8c837_23bc1e9f24024887a160d64430be2cb8.pdf
- https://static.usrfiles.com/ugd/ec0c41_dad0a4c0fe4a421a987107a398002add.pdf
- https://static.usrfiles.com/ugd/b8c837_4e879196731f4fcd8f61cb0a8b758c74.pdf
- https://static.usrfiles.com/ugd/b8c837_0a694811ad564bd38b965194c57d12a1.pdf
- https://static.usrfiles.com/ugd/b8c837_aa2b60c55aad4b728d1a8283c69586e4.pdf
- https://static.usrfiles.com/ugd/b8c837_56cd0f4fcd2f496ba35f911023da22b4.pdf
- https://static.usrfiles.com/ugd/b8c837_e3eed76385524d2680b120440fff8d88.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_off00006143.bine01610f6cd4d6c76df18d9ec7e6d45a6e58ae126dfb660455fd19ad70bd33d15 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6143 | 5716 bytes |
font_01_sfnt_off000074ab.bin1a04b2717349fca198f3dbe19142f43619606738aa2f6385c8804dea8e836c5d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x74AB | 13500 bytes |
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