MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.club'. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to a 'caliber scientific calculator'. The presence of numerous external PDF links, many hosted on 'static.usrfiles.com', suggests a link farm or redirection strategy. The ML classifier also strongly indicated maliciousness.
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.club/wix?keyword=caliber+scientific+calculator+instru
- https://static.usrfiles.com/ugd/b8c837_2df26a97b4c64eae930d8ae76ac9163c.pdf
- https://static.usrfiles.com/ugd/b8c837_b6b5c9e69a094842918f2183ba34707f.pdf
- https://static.usrfiles.com/ugd/dd4472_c19d39406f6c4b3ab24c77585922f362.pdf
- https://static.usrfiles.com/ugd/9ff9b8_93f113e5e0024c4d9c8f326f346aee44.pdf
- https://static.usrfiles.com/ugd/82e28d_ba62a892007d4d64b45d7482c0a4c237.pdf
- https://static.usrfiles.com/ugd/97368a_0cbe354197c041c4b379e2dfd0ef6065.pdf
- https://static.usrfiles.com/ugd/b8c837_2b48c706326740b9a00ace5824efd83d.pdf
- https://static.usrfiles.com/ugd/ea2f88_336fe84ceb79409294d2e7193ac17f37.pdf
- https://static.usrfiles.com/ugd/4c76bf_a0739b4e795745f7ab78ca376a70c8b9.pdf
- https://static.usrfiles.com/ugd/ea9bdf_8e5d0bc737e14389874b5c62f4e3f8cb.pdf
- https://static.usrfiles.com/ugd/09273f_87cd8b02dedb4d98a5c3752262bab350.pdf
- https://static.usrfiles.com/ugd/b8c837_428b077b14644b6ab0bd1aaf80daee26.pdf
- https://static.usrfiles.com/ugd/e2c6c1_be3d87093c604dedabe98ea5a9cc63d4.pdf
- https://static.usrfiles.com/ugd/3f0e57_fd4f8b99e8b34be9b472c09f346e1fab.pdf
- https://static.usrfiles.com/ugd/067ecb_afdf198118094eb2aec55aa451e8d7f8.pdf
- https://static.usrfiles.com/ugd/b8c837_99bcdb78347c48549217c47934f598b3.pdf
- https://static.usrfiles.com/ugd/b8c837_ef41905ea79741ee8c06a51639c6abb8.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_off00005793.bin65236940d9338b542f7c34f41f095026dba54a3cd084c3fdd90bd4ee37edd998 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5793 | 4920 bytes |
font_01_sfnt_off00006858.binacf42072af72a7f4b7ce78510f39c41c91d222f1fd26d222039c1e89d9f35e45 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6858 | 10748 bytes |
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