MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
T1059.001 PowerShell
The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector infrastructure at ttraff.ru. The document body, though heavily corrupted, contains text related to 'Preposiciones en ingles español pdf' and wkhtmltopdf, indicating a potential lure for users searching for language learning materials. The presence of multiple embedded URLs, including one to a malicious redirector, strongly suggests an attempt to redirect users to malicious content.
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/wb?keyword=preposiciones%20en%20ingles%20espa%C3%B1ol%20pdf In PDF document text
- http://files.th1rdspac3.com/uploads/1/3/1/3/131382274/0c1d01d60c4e8d2.pdfIn PDF document text
- http://files.randjcoachesltd.co.uk/uploads/1/3/1/3/131381480/9059815.pdfIn PDF document text
- http://files.hometowncoffeeandtea.com/uploads/1/3/1/8/131857114/lepokudej.pdfIn PDF document text
- http://files.sportsisland.org/uploads/1/3/1/3/131379014/7abca74a7db7d.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/1/0433/0687/7080/files/19441108854.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/5259/6374/files/xenaferojozivupufa.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/9712/1178/files/66558357900.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/6450/0122/files/50509415269.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/6081/3208/files/miwumavonurorusu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5844/5979/files/mepufojekadufepulugevokin.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/0700/7127/files/mitudifipapavefixonarogum.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zumimulapowekulusevenire.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/7091/4717/files/97723886585.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/9934/8389/files/medujikedapotoxexalotek.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/5666/8565/files/tirisobexefisazitanasixu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/1288/0544/files/sajibilanexizu.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
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn 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_off00006ac6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6AC6 | 6744 bytes |
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4 |
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font_01_sfnt_off00007bab.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7BAB | 5244 bytes |
SHA-256: 9862db4146fc71716675d53adfb1cdcd8f1527cbeb96efe96a29692f3ded585e |
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font_02_sfnt_off00008d38.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8D38 | 13536 bytes |
SHA-256: f67b5e4719cd6e24eb4a9cac5adb46631cfa0ade2d4abd569a660678070af52a |
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