MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a malicious redirector link that points to 'https://ttraff.club/wix?keyword=advanced+excel+books+pdf+free'. This link is designed to lure users into clicking it by pretending to offer free advanced Excel books. The PDF also contains a large number of links to external PDFs, many of which are hosted on 'static.usrfiles.com', suggesting a link farm or SEO poisoning attempt to drive traffic to the malicious redirector. 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.club/wix?keyword=advanced+excel+books+pdf+free
- http://bapural.crowleyroofers.com/uploads/1/3/0/8/130814328/7380142.pdf
- http://files.highlightosteopaths.co.uk/uploads/1/3/0/7/130738889/26c57720de5.pdf
- https://static.usrfiles.com/ugd/bdc04d_b806b0e951144aceaf12a4aa64df8031.pdf
- https://static.usrfiles.com/ugd/ace02d_d9c323bcf28041c7b6110de79afc10be.pdf
- https://static.usrfiles.com/ugd/3f2390_7b7308b8f0c94f40bad1c1582e80b948.pdf
- https://static.usrfiles.com/ugd/49be48_b7eaaf6aff3048669a0411764c698d33.pdf
- https://static.usrfiles.com/ugd/b8c837_8e7c60119e7a47c4bb0677d44fedcb88.pdf
- https://static.usrfiles.com/ugd/80fd5d_c3f2b911bda74c9fa45e1f90eed3279e.pdf
- https://static.usrfiles.com/ugd/de65f7_2a26c68d42df47c29f0feba18a94e172.pdf
- https://static.usrfiles.com/ugd/b8c837_550f68f02b6f4b3cba9e291ed6ac1e45.pdf
- https://static.usrfiles.com/ugd/de65f7_b4d33de397ff48668678e5dae26dd716.pdf
- https://static.usrfiles.com/ugd/d2b720_afcd2a545cde4a949a1c5b8e0680d220.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_off00005e63.binc0ff5b90eea2c6eea68828fca0e0d7e74976f726cdaea281e84a3155a89978b6 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5E63 | 5472 bytes |
font_01_sfnt_off00007113.bince5c685b2fc84e23933e9164fe316031493baa743d82e2ac873c2ef1f6142f56 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7113 | 10140 bytes |
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