MALICIOUS
202
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF file contains a lure suggesting it is a business English vocabulary exercise, but it embeds a link to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and PDF_SEO_LINK_FARM indicates a large number of outbound links, many hosted on Shopify. The SE_INVOICE_LURE heuristic further supports the deceptive nature of the document. The primary IOC is the malicious redirector URL.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 6
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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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Fake invoice / payment lure low SE_INVOICE_LUREDocument contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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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=business+english+vocabulary+exercises+pdf In PDF document text
- http://files.nordportal.net/uploads/1/3/2/6/132695451/pibufa-nuwoziwaparama-ranasuzapason.pdfIn PDF document text
- http://files.donaldtrumpacunt.com/uploads/1/3/1/0/131070859/7520e1f8.pdfIn PDF document text
- http://files.courtneymlandis.com/uploads/1/3/0/7/130739312/bfc02e5d.pdfIn PDF document text
- http://files.yvonneburton.net/uploads/1/3/1/3/131384113/5932996.pdfIn PDF document text
- http://files.kaysewienekephotography.com/uploads/1/3/1/6/131636914/bolopamip_pupazaboxenipu_nojupakexax.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/1/0431/5866/7415/files/xabavatatudubuvisavasud.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0459/1271/files/kubulubekegiminol.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/0318/3258/files/2267531588.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/4609/2443/files/savune.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/9925/1093/files/88309931402.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/4416/7064/files/98439261227.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/8463/5544/files/sipukadoxijo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/3358/2998/files/pefanovorovifoz.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/8604/3541/files/lunitefexifiju.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/7840/9639/files/35793768347.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/5881/3333/files/zepunom.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 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00007172.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7172 | 5640 bytes |
SHA-256: 8af650ae4c5d76582d8ad3ddb9d2d306971c4657128fa4bece0ce14a67be793e |
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font_01_sfnt_off00008489.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8489 | 1832 bytes |
SHA-256: 145221cabc2cd2ccba74deb3953ae5503754f1434333b9a87b88d9d5dd338e5b |
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font_02_sfnt_off00008d64.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8D64 | 10156 bytes |
SHA-256: e6df06caea831ecad6b364c258cb3b895eae98a77d4a0f75d6281a68037e55b9 |
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font_03_sfnt_off0000b051.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB051 | 16508 bytes |
SHA-256: 76c58d9dad2553210f58dd276edfbe5dbdf64153339314c97a5850829df6aff1 |
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