MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a link disguised as a security update for Symantec Endpoint Protection, directing users to a malicious redirector. The PDF also features a large number of external links, many pointing to static.usrfiles.com, suggesting a link farm or SEO poisoning tactic to increase visibility. The ML classifier strongly flagged this PDF as malicious, supporting the observed malicious redirector link.
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=update+symantec+endpoint+protection
- https://static.usrfiles.com/ugd/b8c837_451c69a7ab8d4a5fa28f1bf65de6d96e.pdf
- https://static.usrfiles.com/ugd/b8c837_17c8f6c4e40b4f0fa3f29c9311347c6c.pdf
- https://static.usrfiles.com/ugd/a2ebd8_d0ffe0dd220441b0bb89c37e29affd35.pdf
- https://static.usrfiles.com/ugd/a91264_ac887dec1a7b467db043f9d29cc67e79.pdf
- https://static.usrfiles.com/ugd/a4e402_cd9c6305b03c44c58d52823c2548d3e9.pdf
- https://static.usrfiles.com/ugd/d4da64_d12a61695a8240fea8e9b213e435e2ae.pdf
- https://static.usrfiles.com/ugd/b11f6d_f3712a6b002a43f8ac84c69e4112b260.pdf
- https://static.usrfiles.com/ugd/b8c837_2100d23ced5a494985e5751a87342560.pdf
- https://cdn.shopify.com/s/files/1/0435/2930/6263/files/vomokikabidatakuped.pdf
- https://cdn.shopify.com/s/files/1/0437/6225/3978/files/ontological_and_epistemological_foundations_of_qualitative_research.pdf
- https://cdn.shopify.com/s/files/1/0434/1350/4150/files/bewag.pdf
- https://cdn.shopify.com/s/files/1/0431/6351/7092/files/bimobemaxubumebodolupo.pdf
- https://cdn.shopify.com/s/files/1/0436/9609/5397/files/17089253622.pdf
- https://cdn.shopify.com/s/files/1/0431/4460/9943/files/95458368570.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00005b37.bin8d71768ccf781716491961cc119ff584503e77e7cf7b84955ffbcca613eb1ee7 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5B37 | 5068 bytes |
font_01_sfnt_off00006c5d.bin9b12f5bbf8771f80e5f6f38c9b95780e5a0b0c3a2e49e816e1a9a042c1c0444e |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6C5D | 9936 bytes |
font_02_sfnt_off00008e58.binb50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8E58 | 4324 bytes |
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