MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, suggesting a lure to external malicious content. No scripts were extracted, and the primary malicious activity appears to be the redirection via embedded links.
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=lecturas+de+comprension+lectora+para+quinto+grado
- https://static.usrfiles.com/ugd/b8c837_71c8e5e109a04006817cee21205f8c08.pdf
- https://static.usrfiles.com/ugd/b8c837_2efdc721c5be42a198a14bccc0e9b925.pdf
- https://static.usrfiles.com/ugd/bfbc46_48afad2578064e599c997c21c4b02e93.pdf
- https://static.usrfiles.com/ugd/19ce5d_90f5ec21a5fe48fe9e501c1c188ebca0.pdf
- https://static.usrfiles.com/ugd/b8c837_cb8444e3457a4832bae96b7ddb14674a.pdf
- https://static.usrfiles.com/ugd/89c6ad_669badc4f47a491f9f8a9d85cceb5270.pdf
- https://static.usrfiles.com/ugd/429b25_d1b44780b8c1420fb867f650a2da1d8f.pdf
- https://static.usrfiles.com/ugd/dc8a8e_d2a3b74255d741bb8916115238b54223.pdf
- https://static.usrfiles.com/ugd/ee9d3f_4adc9b07e3564358b7dc883ecac9156a.pdf
- https://static.usrfiles.com/ugd/3649d2_d1b6092ba5f440f7ae3f81359f3fc29b.pdf
- https://cdn.shopify.com/s/files/1/0434/6321/3209/files/tivozovozuretidipabej.pdf
- https://cdn.shopify.com/s/files/1/0428/7735/4143/files/rugazu.pdf
- https://cdn.shopify.com/s/files/1/0433/1382/3909/files/78193851692.pdf
- https://cdn.shopify.com/s/files/1/0435/9097/5647/files/89642098181.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_off00006704.bin7c089368ee492f8488094f5fddae69e782c7693a938e3bd5abf4f96254ac80f9 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6704 | 5460 bytes |
font_01_sfnt_off00007973.bince4bd098c64d6986f10eb23df42b53a00fc58b5af239c803ea4212594ab1278c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7973 | 15976 bytes |
font_02_sfnt_off0000a98a.bin2d28dd8d55906943ecdef0e06c16de40d023931e7c445e737a75b065090ba680 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xA98A | 16124 bytes |
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