MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
T1059.001 PowerShell
The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm designed to improve search engine ranking or obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is further obfuscated by a keyword related to preschool education. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or redirection attempt.
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=aprendizajes+clave+educacion+preescolar+pdf In PDF document text
- http://files.nephro-pathology.com/uploads/1/3/2/6/132696274/xutiditu.pdfIn PDF document text
- http://files.tamueventing.com/uploads/1/3/0/9/130969656/jekiwezuvutitine.pdfIn PDF document text
- http://files.caninearthritisandjoint.com/uploads/1/3/0/8/130813409/9348804.pdfIn PDF document text
- http://buvet.southernnaturals.com/uploads/1/3/1/8/131871650/wetilabuletu-giziwamafobimip-vazotet.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/1/0433/0687/7080/files/deved.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/2781/4805/files/chemistry_principles_and_reactions_8th_edition.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/5251/2918/files/kelis_caught_out_there.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/3391/8616/files/92397277742.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/4704/2715/files/fupexifuvalabilirat.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/7061/1861/files/36699124726.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/9074/8316/files/2020_cadillac_sts_manual.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/1804/2018/files/nekolusirel.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/2396/5079/files/mercer_weighted_grade_calculator.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/balevogigadan.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/9276/2017/files/8553135531.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_off0000cd62.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCD62 | 5124 bytes |
SHA-256: 1006c4461063491d5e33b7961b28991abe55e659365e64a78e7158088d0f89fd |
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font_01_sfnt_off0000dee0.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDEE0 | 11632 bytes |
SHA-256: a027457c881a3d43ffc87081f4a05dc95266cdb32277709ec41e6417c7744a08 |
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font_02_sfnt_off00010431.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10431 | 4324 bytes |
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378 |
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