MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a prominent link to a malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text suggesting it is related to answers for a quiz or test, which is a common lure. The PDF also hosts a large number of external links, many pointing to PDFs on static.usrfiles.com, indicating a link farm strategy. 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.link/wix?keyword=capitulo+7b+prueba+7b-+2+answers
- https://static.usrfiles.com/ugd/0cd3a8_6633717c8c1d47ec95dd7df863ffdc76.pdf
- https://static.usrfiles.com/ugd/b98abb_81f979d1b30b4d469924fb50fcc62562.pdf
- https://static.usrfiles.com/ugd/b1b3ad_69a2134dde004d9991cb13102d1a71c6.pdf
- https://static.usrfiles.com/ugd/9eb187_be61556a5b8f4d7e86d26e10bed494ed.pdf
- https://static.usrfiles.com/ugd/d5cf39_e4fc663d0e28492388ad7d3fef7eea09.pdf
- https://static.usrfiles.com/ugd/ec0012_0087a83b574241e0b78c6633de536d52.pdf
- https://static.usrfiles.com/ugd/76dd3d_3fbf9cc18bed424eadd166c5014f8720.pdf
- https://cdn.shopify.com/s/files/1/0437/7329/6789/files/zugofeleluzelitimuz.pdf
- https://cdn.shopify.com/s/files/1/0435/5584/8355/files/software_deployment_plan_document_template.pdf
- https://cdn.shopify.com/s/files/1/0437/9593/9488/files/aphorisms_of_hippocrates.pdf
- https://static.usrfiles.com/ugd/7ae8b3_8244b574553a423a97ee771338ab55f0.pdf
- https://static.usrfiles.com/ugd/ac72e0_5a619139c0854cd8861c4cbc124362df.pdf
- https://static.usrfiles.com/ugd/d48fe3_02d86e58f6f74682a430a03b474bbb04.pdf
- https://static.usrfiles.com/ugd/b8c837_2ec284379e554faf84c97e216abefd89.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_off000060b6.bin63c95def3319337ea4f65891e055bea528f37b0335a332a9a9d4d4435ac2d622 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x60B6 | 5192 bytes |
font_01_sfnt_off00007281.bine7922a377fd89ae957b00f81743f975ec2f898a04818e8801d18c03d3bc6929e |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7281 | 11720 bytes |
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