MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting an attempt to leverage SEO for malicious distribution. The presence of the URL 'https://ttraff.ru/wb?keyword=retrosynthesis%20organic%20chemistry%20pdf' further supports the malicious intent by pointing to a known redirector. The document body itself is heavily obfuscated and contains numerous URLs, reinforcing the link farm tactic.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 5
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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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Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINKPDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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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/wb?keyword=retrosynthesis%20organic%20chemistry%20pdf In PDF document text
- http://files.ritchierockmcbride.com/uploads/1/3/1/3/131380569/9417293.pdfIn PDF document text
- http://files.reaganinmyownworld.com/uploads/1/3/0/7/130738614/f277a2dd.pdfIn PDF document text
- http://fegeki.stephaniemeredithart.com/uploads/1/3/0/7/130738524/c49d87.pdfIn PDF document text
- http://files.caloriekitchen.co.uk/uploads/1/3/1/8/131871745/4514188.pdfIn PDF document text
- http://files.mariecharpentier.net/uploads/1/3/1/4/131483019/batipaxadas.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/6806/2872/files/makalah_peradaban_islam_pada_masa_dinasti_abbasiyah.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/5800/3096/files/16774685134.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/7399/3890/files/64061453416.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/3311/6317/files/6253325955.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/7758/0453/files/sorry_justin_bieber_lyrics.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/4582/1338/files/zakotesa.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/4077/6090/files/xivijojole.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/7567/4014/files/bofuseretelokuxiwezofiz.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0458/3318/files/10243631777.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/2250/8454/files/22094856181.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/3013/3406/files/39735875325.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/1918/1978/files/descargar_biblia_de_estudio_diario_vivir.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000740d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x740D | 5644 bytes |
SHA-256: ea0dfa0dccfa63e61d23744282feff6a297cf7e2a70cc8d343bc4fe4f120cf6f |
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font_01_sfnt_off00008725.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8725 | 10336 bytes |
SHA-256: 3a459f9b5ef96b360605e4e9bd030d43f39b782404acf1a7b7562aa3289b1572 |
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