MALICIOUS
202
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
T1204.002 Malicious Link
The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to enrollment letters, aligning with the 'SE_INVOICE_LURE' heuristic. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. The file is generated by wkhtmltopdf, a tool often abused for creating malicious PDFs.
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=proof+of+enrollment+letter+template In PDF document text
- http://files.libertymerchandise.org/uploads/1/3/1/3/131380305/nulasifufetor.pdfIn PDF document text
- http://files.nwavalanchesolutions.com/uploads/1/3/2/6/132681579/vogawuxe-dumosikukajof-gutizilaf-ribakulamusa.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/1/0429/6183/0037/files/bidaramud.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0439/6164/7262/files/17620295301.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/0660/7012/files/86752491817.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/9204/2137/files/17174566941.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/2668/5858/files/sinimabefanu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/9471/1203/files/xijaxapajapolarib.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/0699/9203/files/anil_s_ghost_analysis.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8179/3698/files/sefuziwevudijam.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/8799/4792/files/on_golden_pond_quotes.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/4864/0418/files/kowujur.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0363/3051/files/nine_knowledge_areas_of_project_management.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0012/6885/files/fedisosemo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/7289/6672/files/14825299232.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000a5df.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xA5DF | 2828 bytes |
SHA-256: b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a |
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font_01_sfnt_off0000afda.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xAFDA | 4872 bytes |
SHA-256: b386fbcb630aaac2f7bcfe67cecb519f65b503068390f5338a0cba932b8378ae |
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font_02_sfnt_off0000c04e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC04E | 13256 bytes |
SHA-256: fa5165341318c00ecf0d266f6767264aee62f0b825dbf9631149b928d221c6ea |
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