MALICIOUS
150
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF file contains a lure for free piano sheet music, but analysis reveals it is a malicious redirector link farm. The primary URL, https://ttraff.ru/wix?keyword=free+piano+sheet+music+for+black+gos, is flagged as malicious. The document also contains a large number of embedded links pointing to a PDF link farm hosted on static.usrfiles.com, indicating a potential SEO poisoning or traffic generation scheme. The ML classifier strongly supports the malicious verdict.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 3
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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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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=free+piano+sheet+music+for+black+gos
- https://static.usrfiles.com/ugd/ca32a8_b521398ed96e49daba06ab231707e07f.pdf
- https://static.usrfiles.com/ugd/4d400c_0cc5657039fc44de98b1d518529750d8.pdf
- https://static.usrfiles.com/ugd/b8c837_790dd339d1a04b8fb4af639928740fc0.pdf
- https://static.usrfiles.com/ugd/7f46b5_9e3ea5e9262148f481dea97d2d9895a9.pdf
- https://static.usrfiles.com/ugd/b8c837_88337e4664b04b30ac83f69ffabd745e.pdf
- https://static.usrfiles.com/ugd/b8c837_358936d5b6e44a50b4e47cd05945ba52.pdf
- https://static.usrfiles.com/ugd/b8c837_f8f5da4104c14252bd22190d61d8cc19.pdf
- https://static.usrfiles.com/ugd/b8c837_aee1749d4d0c47098118cd85d555da8a.pdf
- https://static.usrfiles.com/ugd/b8c837_681f2cc7fc5c4ddc8bff164975e67588.pdf
- https://static.usrfiles.com/ugd/b8c837_2e529d465a5344bc9444a67a397cd5c9.pdf
- https://cdn.shopify.com/s/files/1/0430/2556/3801/files/football_logo_maker_free.pdf
- https://cdn.shopify.com/s/files/1/0431/4683/8176/files/34093796286.pdf
- https://cdn.shopify.com/s/files/1/0440/9622/5432/files/stihl_fs55r_manual.pdf
- https://cdn.shopify.com/s/files/1/0433/4839/4142/files/3ds_cia_apps.pdf
- https://cdn.shopify.com/s/files/1/0432/2436/7266/files/luporanawagesifujap.pdf
- https://cdn.shopify.com/s/files/1/0461/4294/7481/files/happy_new_year_piano_sheet.pdf
- https://cdn.shopify.com/s/files/1/0432/6758/8252/files/capsulitis_adhesiva_de_hombro.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_off0000d2cf.bin7e351d6f0fbd7f41fa58e2cd0f91714e8f9d13ead1770e3fd8af1197d1c38296 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD2CF | 5588 bytes |
font_01_sfnt_off0000e5a2.bina16dcfeb6b88b14c554e32280aeed71721b8965a8f8d00e1ba437507ee0c7400 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE5A2 | 10636 bytes |
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