MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains this URL and references to 'livro farmacologia goodman', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on 'static.usrfiles.com'. 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.ru/wix?keyword=livro+farmacologia+goodman
- https://static.usrfiles.com/ugd/3f80ec_93eb8fbf9f6340f387ca075c4bdea472.pdf
- https://static.usrfiles.com/ugd/0286dd_e48b1ae396d840c5a8e0876bdf44a4b3.pdf
- https://static.usrfiles.com/ugd/b8c837_54a94d06a7ac41cfb877999f10410ccf.pdf
- https://static.usrfiles.com/ugd/b8c837_fae49135642142e999509e05cca976d6.pdf
- https://static.usrfiles.com/ugd/cd79e3_d727d71f369d4ef2bdcfeccc1ccaf02a.pdf
- https://static.usrfiles.com/ugd/0aab01_0af4048d03bd461b88de578c5a11d509.pdf
- https://static.usrfiles.com/ugd/b8c837_1a3a734cf46e429b9e3999b0607068bf.pdf
- https://static.usrfiles.com/ugd/2e16aa_32114484c9b646379c6d666dc690d91e.pdf
- https://static.usrfiles.com/ugd/d2751c_ac2b5eee17364374bafd19f5ffee4310.pdf
- https://static.usrfiles.com/ugd/7d21c0_7f1885dde0fd4506b58816f1c89834da.pdf
- https://cdn.shopify.com/s/files/1/0429/9672/7962/files/bedapat.pdf
- https://cdn.shopify.com/s/files/1/0433/3230/5054/files/lewesomen.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_off00005114.binfd1725588828f0e05566e01b0fda215d4573fa5ef73bb4bc2620362e2a8afeec |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5114 | 5164 bytes |
font_01_sfnt_off00006291.binee712a8b185f1ca5fd82cffff91ab3ea091de13ad05e456e5e8fce3af0814695 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6291 | 11576 bytes |
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