MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a large number of embedded links, many pointing to external PDF files hosted on various domains, which is indicative of a link farm or SEO poisoning attack. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=assessment+center+f%25C3%25BChrungskr%25C3%25A4fte+pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF links, reinforcing the lure-based attack pattern.
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/pify?keyword=assessment+center+f%25C3%25BChrungskr%25C3%25A4fte+pdf In PDF document text
- http://files.babywhoopsie.com/uploads/1/3/1/1/131164402/sadewapekuraxib-vevetire-wodoz-torel.pdfIn PDF document text
- http://files.power2motivateme.com/uploads/1/3/1/3/131378990/warexife.pdfIn PDF document text
- http://files.botanicalchildren.com/uploads/1/3/1/4/131437087/3779083.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/1/0431/0371/5489/files/livre_d_orthographe_franais.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/5505/3989/files/sisosejubar.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/3862/9270/files/kotixesisijuj.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/6686/0455/files/65019481236.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/1298/7802/files/12637298410.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/0263/4148/files/carnival_phantasm_op.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/8315/9970/files/97069266451.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/2841/3607/files/chloroplast_genome_structure_and_function.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/2398/3015/files/tizasepesikuse.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/5544/7202/files/borrow_vs_lend_exercises.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/1355/4855/files/12351332629.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/9733/3664/files/piwarawutinewokoxiguji.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/4045/4294/files/18640858303.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00007b5d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7B5D | 5736 bytes |
SHA-256: 1bdf4a131545051e73fe2c72823cf560763e40c1b18a6f9137903c233bb115cd |
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font_01_sfnt_off00008e77.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8E77 | 11192 bytes |
SHA-256: 7270cde59a76eee8b3153cf8706b07379faf0f7c6c41a889c7bcbb024bb86f43 |
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font_02_sfnt_off0000b335.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB335 | 16084 bytes |
SHA-256: 9065dbc6154a30e064f5b750d4b12464706f21ef18449ce5c48e12724f01b265 |
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