MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
T1204.002 Malicious Link
The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=applied+statistics+and+probability+for+engineers+pdf`. Additionally, it exhibits characteristics of a PDF link farm, with numerous links pointing to external PDFs, many hosted on `cdn.shopify.com`. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the target URL and a reference to a book title, suggesting a lure.
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=applied+statistics+and+probability+for+engineers+pdf In PDF document text
- http://files.lucygorman.com/uploads/1/3/1/4/131407647/eca27.pdfIn PDF document text
- http://files.cheshiredem.org/uploads/1/3/2/6/132682820/6151629.pdfIn PDF document text
- http://files.lotusenergyandmassage.com/uploads/1/3/1/8/131856290/9914773.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://cdn.shopify.com/s/files/1/0435/8098/1403/files/48259359465.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/4162/8072/files/nupesosus.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/7628/7648/files/48081889369.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/4673/9878/files/17100594060.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0127/3758/files/fowipu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/6856/9238/files/rosoxotefixapode.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/1415/2607/files/sp_sp2_sp3_hybridisation.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/6772/7269/files/40589081488.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/6132/1634/files/11296210697.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/4569/0261/files/wojebagozipafiropedimolag.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/6585/1560/files/72294632032.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0450/3525/8020/files/chadariya_jhini_song_free.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/8621/6344/files/56622582978.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
stream_006_off0000c2c9.bin |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0xC2C9 | 20940 bytes |
SHA-256: 50ec90415f236ce722aedc5edc6287c94ced8369d815677976cda44771d6c7b1 |
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font_00_sfnt_off00008505.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8505 | 5340 bytes |
SHA-256: 6fd516c35f3db74bbeb83eb40fe91137516bed04c2c02a15fbc99e410d400def |
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font_01_sfnt_off00009734.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9734 | 13960 bytes |
SHA-256: 0829d2407c536f455f9020519543f360689d5cbb7be7298d461500a3435d1c1a |
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font_03_sfnt_off0000e6db.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE6DB | 4324 bytes |
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c |
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