MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
This PDF file was flagged by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=cfm56+5b+engine+pdf, which is identified as a malicious redirector. The file also functions as a link farm, containing numerous external PDF links, many hosted on Shopify, which is a common tactic for SEO poisoning and distributing malicious 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.ru/pify?keyword=cfm56+5b+engine+pdf
- http://files.graybiel-lab.com/uploads/1/3/0/8/130814126/9885208.pdf
- http://files.sitimeline.com/uploads/1/3/1/3/131398140/gesibuzek.pdf
- http://files.michaeldobbsbooks.com/uploads/1/3/1/8/131871849/nunako.pdf
- https://cdn.shopify.com/s/files/1/0433/7503/4524/files/pexiwirezeroluwuwuruxizu.pdf
- https://cdn.shopify.com/s/files/1/0437/4714/7928/files/56087510346.pdf
- https://cdn.shopify.com/s/files/1/0434/9041/0658/files/lurofakun.pdf
- https://cdn.shopify.com/s/files/1/0432/4337/2699/files/sqlalchemy_drop_table.pdf
- https://cdn.shopify.com/s/files/1/0429/6956/3290/files/85470802338.pdf
- https://cdn.shopify.com/s/files/1/0428/8305/5782/files/88953264803.pdf
- https://cdn.shopify.com/s/files/1/0428/9685/1103/files/bridgeport_mill_manual.pdf
- https://cdn.shopify.com/s/files/1/0433/0127/3758/files/potenamibekima.pdf
- https://cdn.shopify.com/s/files/1/0429/5216/3482/files/88701483589.pdf
- https://cdn.shopify.com/s/files/1/0428/5880/7455/files/3719286245.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_off00005c1a.binbf730c7344a33dc46b8bd829d3f12f3e985cac71f6030dd18b94423ecc9385de |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5C1A | 5168 bytes |
font_01_sfnt_off00006d9c.bin248eb9f7b89098ff0dae6b32d372e5892264cca2e8b394aa9570c6f7802be187 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6D9C | 11132 bytes |
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