MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF document contains embedded links that lead to a malicious redirector, disguised as a CBSE mark sheet. The redirector is likely used to host or deliver a secondary payload. The ML classifier strongly indicated maliciousness, and multiple heuristics fired for malicious redirector links and SEO link farming.
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.cc/pify?keyword=mark+sheet+of+class+10+2019+cbse In PDF document text
- http://files.referendumcentral.org/uploads/1/3/0/8/130874435/fesetitojana.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/1/0433/0071/6694/files/tifojise.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/8807/7209/files/22525933147.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/7341/4055/files/wukadidefel.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/7506/6273/files/how_to_extract_subtitles_from_mkv.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0452/1259/8423/files/candy_metadata_online.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/8905/8209/files/75137140318.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/7170/8065/files/66626965506.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/2177/0656/files/6351806127.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/9340/8409/files/hallelujah_leonard_cohen_free.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/0398/4547/files/farberware_air_fryer_manual.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/8509/3272/files/binomial_option_pricing_excel_template.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_off00006313.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6313 | 5660 bytes |
SHA-256: 3ba882d14bbcd9580596b0d09141b9edff321df84204636bb97c5a06734ae671 |
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font_01_sfnt_off0000764e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x764E | 3264 bytes |
SHA-256: dc9ebcf7cd3d0a4764148c39e6ce1a3badcb76c9d5a02d2b7663a48fbea2df0c |
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font_02_sfnt_off00008419.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8419 | 10152 bytes |
SHA-256: 8ffcff5ed95044a2fa1a5d9ded5fa366ca6b9f834d12437f62d8882a0d7773d4 |
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font_03_sfnt_off0000a711.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xA711 | 16148 bytes |
SHA-256: 676a6f9980301d650ad9b511319da6dac9fff4f77c228169d287e5253a078183 |
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