MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm, with numerous external links, many pointing to static.usrfiles.com. The primary malicious URL identified is https://ttraff.club/pify?keyword=science+brain+teasers+with+answers+pdf. The document body, though heavily obfuscated, contains this URL, suggesting a lure to a malicious site. No scripts were extracted, but the PDF structure and URL firings strongly suggest a malicious redirection attempt.
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/pify?keyword=science+brain+teasers+with+answers+pdf
- https://static.usrfiles.com/ugd/4329d7_9dec884e93ae4da7ab0ef848caa3a166.pdf
- https://static.usrfiles.com/ugd/a421e3_14a4bf0497f74dd1b5ae25760a240432.pdf
- https://static.usrfiles.com/ugd/8d0191_5197035b9efc438ab34f937831085a0b.pdf
- https://static.usrfiles.com/ugd/98d33d_feec275a2e71472f939c0d9a889be602.pdf
- https://cdn.shopify.com/s/files/1/0429/9456/5271/files/bupomibafov.pdf
- https://cdn.shopify.com/s/files/1/0430/4519/1841/files/55091982871.pdf
- https://cdn.shopify.com/s/files/1/0431/5650/4744/files/88648568996.pdf
- https://cdn.shopify.com/s/files/1/0434/1573/2376/files/13934686647.pdf
- https://cdn.shopify.com/s/files/1/0428/2230/3911/files/bolens_lawn_mower_manual.pdf
- https://static.usrfiles.com/ugd/aff7ca_48d0aea10e9e41979f5c629e721382ff.pdf
- https://static.usrfiles.com/ugd/1f5cef_4e81960464e946ae9048b41fb8dafe41.pdf
- https://static.usrfiles.com/ugd/a32c20_23924e733297403da9e491f0850aa9f8.pdf
- https://static.usrfiles.com/ugd/866690_40d057c7597042ef81eb1282ff8fc3f1.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_off00009611.bin58b251811ddbcc16469daa2636880a1971e179a2510038dbe531bc0e36613b0f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9611 | 5548 bytes |
font_01_sfnt_off0000a8f8.bin2eb4b359796c7187643b8c48b25e8da7245cf490fccfdf5be130c39a8ec227c0 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xA8F8 | 10404 bytes |
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