MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on static.usrfiles.com, forming a link farm. One prominent link directs to ttraff.com, which is flagged as a malicious redirector. The document's content, though garbled, suggests a lure related to a 'periodic puzzle answer key'. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to malicious infrastructure.
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.com/wix?keyword=periodic+puzzle+answer+key
- https://static.usrfiles.com/ugd/fd7405_c6d9812e261a49b0b7e72a541c68ab23.pdf
- https://static.usrfiles.com/ugd/625844_51af9ee195d549599fb3b43df4fa260b.pdf
- https://static.usrfiles.com/ugd/74c34a_af490262228e42b284fa4858f37094cb.pdf
- https://static.usrfiles.com/ugd/5ad03d_67ea5358c19d4890bf6050668274c4e5.pdf
- https://static.usrfiles.com/ugd/b8c837_463de93d2f4c4289be6300a96b299f5c.pdf
- https://static.usrfiles.com/ugd/b8c837_7eb12e43ac1a4dfba1729cfb09986dba.pdf
- https://static.usrfiles.com/ugd/3bf302_80cb9fa8e5d8499ea8dc0e4a50d478c2.pdf
- https://static.usrfiles.com/ugd/b8c837_cd358dfc61e540668b4d35995bce5230.pdf
- https://static.usrfiles.com/ugd/857e61_79b0f89642f945f9bb7423275e7db60d.pdf
- https://static.usrfiles.com/ugd/b47706_e9c64b3f40744753a10401d1d1d14197.pdf
- https://static.usrfiles.com/ugd/2c8d66_01c9c412005d43a6a996c86069e175ff.pdf
- https://static.usrfiles.com/ugd/6908d7_22b363c86b2f497eb0e88df6caf3571f.pdf
- https://static.usrfiles.com/ugd/b8c837_bad49abe751b4e6fbf4d31c8e0ebd9e1.pdf
- https://static.usrfiles.com/ugd/a771bd_4270116450284aebb98a0c1694cadbce.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_off0000645d.bin612952de03cd312f18ba3702760ac134f60a92073cc4dc6d76f660b3ca692ff6 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x645D | 5376 bytes |
font_01_sfnt_off000076cb.bin0ee231385211375ba9993d8785f47854ca2127745480eba7a2b302d7322cea57 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x76CB | 10228 bytes |
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