MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains a large number of external links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'nsk bearing replacement guide pdf'. The ML classifier strongly indicates maliciousness, and the presence of a redirector link suggests an attempt to lead the user to a malicious site.
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=nsk+bearing+replacement+guide+pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_55aefac4bb4040a7ad352026639c18a9.pdf
- https://static.usrfiles.com/ugd/b8c837_1deed982071a48139a93912da9e86076.pdf
- https://static.usrfiles.com/ugd/b8c837_f8bcfb6edb6f4ee89012a1a3fcc13600.pdf
- https://static.usrfiles.com/ugd/b8c837_1a894635b6aa4afaa3b674279dc55d6f.pdf
- https://static.usrfiles.com/ugd/b8c837_bb7553ecb1ec4367884471ef84d1f983.pdf
- https://static.usrfiles.com/ugd/b8c837_9af6a01153da4800bb69aa80a8cf6f5b.pdf
- https://static.usrfiles.com/ugd/b8c837_ed2ec2532ab9414db6307d41b171cbf8.pdf
- https://cdn.shopify.com/s/files/1/0440/7849/7944/files/sediwakuzugeladoraluju.pdf
- https://cdn.shopify.com/s/files/1/0434/0878/5562/files/87355578116.pdf
- https://cdn.shopify.com/s/files/1/0430/5498/9466/files/4008-_101-_a65.pdf
- https://cdn.shopify.com/s/files/1/0431/5817/5893/files/google_chrome_para_kali_linux.pdf
- https://cdn.shopify.com/s/files/1/0429/1015/4908/files/clang_implicit_instantiation_of_undefined_template.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/
- http://scripts.sil.org/OFL
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00006173.binf639fbd353e4eb99d3a300124c76177138c533b89ac1949a59f9bc4f35edd726 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6173 | 5648 bytes |
font_01_sfnt_off00007491.bin002953d4b2cb1010081c11d1865d6b569c1caafec4b25f77253bdccddbd91006 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7491 | 13392 bytes |
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