MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The file also exhibits characteristics of a PDF link farm, suggesting an attempt to distribute malicious content. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be luring users to a malicious URL disguised as a book download.
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.ru/wix?keyword=nivaldo+tro+chemistry+a+molecular+approach+3rd+edition
- https://static.usrfiles.com/ugd/b8c837_aa8fbb4b95394160820bdbedba2ec3fe.pdf
- https://static.usrfiles.com/ugd/b8c837_de84b0372ee94273bc50965e0f4c71ee.pdf
- https://static.usrfiles.com/ugd/277b62_716527e2f5cf47329d35c674c52734ac.pdf
- https://static.usrfiles.com/ugd/b8c837_132eb013f89043e59db09a7000f93195.pdf
- https://cdn.shopify.com/s/files/1/0430/9896/4117/files/rufazuranoxibab.pdf
- https://cdn.shopify.com/s/files/1/0432/9468/7400/files/big_ideas_math_high_school_algebra_1.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.pdf
- https://cdn.shopify.com/s/files/1/0433/2145/8853/files/ratiguzaridiwiwekev.pdf
- https://static.usrfiles.com/ugd/b8c837_2c72998f81a24045ab070bbb986368ff.pdf
- https://static.usrfiles.com/ugd/b8c837_e92078842fa141ccbf09640afcee7c59.pdf
- https://static.usrfiles.com/ugd/b8c837_923bbfc14b07433fbd2d5976e3bd228b.pdf
- https://cdn.shopify.com/s/files/1/0436/0850/6531/files/ruzifilaguna.pdf
- https://cdn.shopify.com/s/files/1/0430/4686/3005/files/nijunorerilobebufi.pdf
- https://cdn.shopify.com/s/files/1/0433/8515/9843/files/wufinotabunazakab.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_off00004e80.bine87e4415a09312b62e3bd095dc22ed6c64bcc1e9ae3d5259ce9c46fec9eebf60 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x4E80 | 5608 bytes |
font_01_sfnt_off00006177.bin16272913226a360f93050f9ca0e123c7518fde4405f0d470afe819bf850eb9e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6177 | 9632 bytes |
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