MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=acute+bronchitis+%25E0%25B8%2584%25E0%25B8%25B7%25E0%25B8%25AD+pdf, which is flagged as malicious. This suggests the PDF is designed to redirect users to harmful 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/pify?keyword=acute+bronchitis+%25E0%25B8%2584%25E0%25B8%25B7%25E0%25B8%25AD+pdf In PDF document text
- http://files.ab4xy.com/uploads/1/3/2/7/132740250/d26e02e666c3a.pdfIn PDF document text
- http://files.politicsfortomorrow.eu/uploads/1/3/1/4/131438046/jitamomupezizavavira.pdfIn PDF document text
- http://files.unorthodoxphilanthropy.org/uploads/1/3/1/8/131872079/fc8b4ce6cf.pdfIn PDF document text
- http://files.richmondeducationfoundation.com/uploads/1/3/2/6/132695829/4245082.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.opentle.orgIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9026/4742/files/macos_sierra_download.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rimudunibodosugesujusuvud.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/7211/1260/files/96362458180.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/6350/0197/files/wafulurutexizako.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/3886/6593/files/wazuwolixogimedipodonawa.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/1274/2550/files/57232141977.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/6071/4904/files/37418684571.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/9779/2415/files/razilufifatunos.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/1864/7709/files/tomivan.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0659/0106/files/44191969017.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/6886/6208/files/mitomopowepetuwajutofajeg.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
- https://medlineplus.gov/acutebronchitis.htmlIn 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://www.gnu.org/licenses/gpl.htmlIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off000070f3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x70F3 | 5132 bytes |
SHA-256: d33dadba99a5d0bc504671ed8109f401af73c59d51d461acb87c2297dbabf285 |
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font_01_sfnt_off0000825e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x825E | 6180 bytes |
SHA-256: 7f01a62d9a356a7e8cf89936be4f54fbc8d35ab3df846d7a2a19af92b9a2f08f |
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font_02_sfnt_off00009266.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9266 | 10392 bytes |
SHA-256: 0c008a0c6876adb41d49504cae261e8b7b86b395da6ed731bb23592851f7a773 |
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