MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised within content related to 'piano chords app for android free'. The PDF also hosts a large number of external links, many pointing to static.usrfiles.com, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. The ML classifier strongly flagged this PDF as malicious.
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=piano+chords+app+for+android+free
- https://static.usrfiles.com/ugd/362633_bbe27b4ba87d4a6b82fab6053dc093e3.pdf
- https://static.usrfiles.com/ugd/b8c837_d224297b83204df286bf3ea34a045d72.pdf
- https://static.usrfiles.com/ugd/1df9ea_9f19ef001eaf48ba8d19295da91c93e3.pdf
- https://static.usrfiles.com/ugd/0d089b_b8135c05edca4b8193919c315d55f7a6.pdf
- https://static.usrfiles.com/ugd/88a84f_7214afa992314cf2b1d6191b7bf65c37.pdf
- https://static.usrfiles.com/ugd/b8c837_b3d1e5b9c4dc424298829ba826c98630.pdf
- https://static.usrfiles.com/ugd/565485_ce3389c254254e3086577f5cbb956e8a.pdf
- https://static.usrfiles.com/ugd/a771bd_3d9ecafe8dc7420fb68bcdb8ab8cfd41.pdf
- https://static.usrfiles.com/ugd/2ca09c_6daa07ef58be47d2a1431180ef1de286.pdf
- https://static.usrfiles.com/ugd/b8c837_d9e7c9bed2094387a6a135083fc17d9a.pdf
- https://static.usrfiles.com/ugd/bf650e_3dccfd46ec28425aa69e80409cb2013a.pdf
- https://static.usrfiles.com/ugd/b8c837_e30834b7bebc4605ad908d10f6433425.pdf
- https://static.usrfiles.com/ugd/b8c837_0abbcbbff42644c4a10cc8ae1872525a.pdf
- https://static.usrfiles.com/ugd/c0b427_4aece5a0e586452283253129146756e1.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_off00006553.binc3ee062090a14cf83bc833f2f896ec2389be9ef5aab3c354878f5bd7b43de271 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6553 | 5212 bytes |
font_01_sfnt_off0000770a.bin7fdfd0951a19b6e9d5628f98d4b55bbd8038589642e6f4af9b40d1b0cc03ee3a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x770A | 10132 bytes |
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