MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous external links, many of which point to `static.usrfiles.com`. The primary malicious URL identified is `https://ttraff.com/wix?keyword=letter+m+worksheet+for+kindergarten`, which is likely used to redirect users to a phishing or malware distribution site. The document body contains garbled text but includes the same URL, suggesting it's part of the lure.
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=letter+m+worksheet+for+kindergarten
- https://static.usrfiles.com/ugd/b8c837_4b37cb7d5ce14beebf8bb283dede45f2.pdf
- https://static.usrfiles.com/ugd/b8c837_59fa1813d14a48b384a6d51b8831d1e2.pdf
- https://static.usrfiles.com/ugd/ba3095_a1c1032232e74093ad8496f6870361bf.pdf
- https://static.usrfiles.com/ugd/10b11f_45d89417241c4d898b93dbe5ac2964f9.pdf
- https://static.usrfiles.com/ugd/b8c837_2e20cf22dcff4ccd9db6f99ace2f907b.pdf
- https://static.usrfiles.com/ugd/b8c837_ad64b139ef814e4697fa16b5cca6eaac.pdf
- https://static.usrfiles.com/ugd/b8c837_6b9aa2129126495195f1cc0c1c0a91c5.pdf
- https://static.usrfiles.com/ugd/6908d7_fdeb47750e4147d3973dd5dbe3abc99e.pdf
- https://static.usrfiles.com/ugd/b8c837_f72259117af24ee7bd0d4a59a6a7b8a7.pdf
- https://static.usrfiles.com/ugd/b8c837_fff7a2b6cdc04b4a86919b16fa7089a6.pdf
- https://static.usrfiles.com/ugd/b8c837_a8977a81fa1544d79f2289a7fe1f5aff.pdf
- https://static.usrfiles.com/ugd/b8c837_8ccba908413f4b75b4dbe3ec35274bd2.pdf
- https://static.usrfiles.com/ugd/b8c837_0cb7a68ba40f40898af76c2d6bd1c429.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_off00006650.bina55a478f432c50b21e324df3222d7694f0026bd24b6a77dccb011efb79a839e2 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6650 | 5388 bytes |
font_01_sfnt_off00007893.bin4fa0fe6a03541b3d9fffb5ce1e5c3a9f615c94f6a3c100b5d81c835f9e3dd068 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7893 | 10784 bytes |
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