MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
T1204.002 Malicious Link
The PDF contains a malicious redirector link disguised as a piano sheet music PDF. This link, 'https://ttraff.cc/wix?keyword=yesterday+once+more+piano+sheet+music+pdf', is designed to lead the user to malicious infrastructure. The PDF also contains a large number of links to static.usrfiles.com, likely part of a link farm to improve search engine ranking for the lure. The ML classifier 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.cc/wix?keyword=yesterday+once+more+piano+sheet+music+pdf
- https://static.usrfiles.com/ugd/b8c837_00f6da6b9eb74805bdcb834ec91d1cc1.pdf
- https://static.usrfiles.com/ugd/b8c837_acbb15457539486ea5a29a4648c0df70.pdf
- https://static.usrfiles.com/ugd/b8c837_7ca9236a8cce4246a9ea33e387d48a58.pdf
- https://static.usrfiles.com/ugd/b8c837_76426c93836a446db7be881da02757fc.pdf
- https://static.usrfiles.com/ugd/b8c837_8c79d1e4fec24a21b436b33c2cb6f765.pdf
- https://static.usrfiles.com/ugd/b8c837_02d3e4587d254423a7fbd95ea432ab12.pdf
- https://static.usrfiles.com/ugd/b8c837_29d15258593e44d387c7d55473aceaf8.pdf
- https://static.usrfiles.com/ugd/b8c837_f0bb93717ae547a483ecad8353f8e0f4.pdf
- https://static.usrfiles.com/ugd/b8c837_a0be487f52944c82adfb2723d1fd4d16.pdf
- https://static.usrfiles.com/ugd/b8c837_ddb5693a4e1948ef990733007f7e0f32.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdf
- https://cdn.shopify.com/s/files/1/0436/9183/5545/files/xelavodibubanuxiralifan.pdf
- https://cdn.shopify.com/s/files/1/0435/5339/0743/files/probability_theory.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_off000045b1.bind796e2b1550f81bb6b3554f7a284b36ea170c3e8b7e8c866cabc972e15054788 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x45B1 | 5428 bytes |
font_01_sfnt_off00005804.bin074f975c24d4fc0d1e308aa0ba75db9c52b6f032886d167b614d78883eb4e8c5 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5804 | 9820 bytes |
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