MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a mass of external links, with one specifically identified as a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure related to a textbook, and the primary malicious URL is directly embedded. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful content.
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=physics+for+architects+2nd+edition+pdf
- https://static.usrfiles.com/ugd/83b1b3_238dc20d038c4a35a71f5a3a4fb9f2b2.pdf
- https://static.usrfiles.com/ugd/b8c837_1c4fb647dd054692b25bf14dd7892cc3.pdf
- https://static.usrfiles.com/ugd/b8c837_2575ec882dff48b9964eae78e446db25.pdf
- https://static.usrfiles.com/ugd/b8c837_6371cab9a18e4de4afbad73d6b44d57c.pdf
- https://static.usrfiles.com/ugd/b8c837_19b538f52b314fc4ac84d734c69df4f6.pdf
- https://static.usrfiles.com/ugd/15d534_dc6c1a6940624f57b8ddc0241dbbd225.pdf
- https://static.usrfiles.com/ugd/b8c837_3779e1ff77d548e4b8f32dba99ca3db1.pdf
- https://static.usrfiles.com/ugd/086daf_ae5669fe57fd4423ab7e93668000a26f.pdf
- https://static.usrfiles.com/ugd/b8c837_48778e73c58143f6bc95d734ac4f1bf1.pdf
- https://static.usrfiles.com/ugd/b8c837_d09a7755d81c41c5be4fe9e2f898cce6.pdf
- https://static.usrfiles.com/ugd/b8c837_ad908162b8fe44ed80bf2d3668d8be69.pdf
- https://static.usrfiles.com/ugd/9b5f63_2b9efabf8df54aed847bc3b98e9f58bc.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_off00005c19.bin387a85b70b41a04ae71ed9e35de8639153a576538ad0c37a7a0f792774724c15 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5C19 | 5448 bytes |
font_01_sfnt_off00006e91.bin7cbe0f55615851858fb2ef00c777b274c4be9abbc174a6e91544338334b4ad21 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6E91 | 16016 bytes |
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