MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector at ttraff.cc. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure users to a harmful site under the guise of providing study materials. The ML classifier strongly supports the malicious nature of this PDF.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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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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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/wb?keyword=cambridge%20first%20certificate%20in%20english%203%20with%20answers%20pdf
- http://files.mollyecklerart.com/uploads/1/3/1/6/131606261/degota.pdf
- http://files.polowl.com/uploads/1/3/1/8/131857626/5346932.pdf
- http://zejomut.nataliejimenez.com/uploads/1/3/1/4/131408280/009f5c.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0434/6655/5556/files/47040508146.pdf
- https://cdn.shopify.com/s/files/1/0434/0767/1448/files/academic_ielts_vocabulary.pdf
- https://cdn.shopify.com/s/files/1/0427/5650/5756/files/24335970548.pdf
- https://cdn.shopify.com/s/files/1/0431/2865/1938/files/how_to_delete_chromium_from_mac.pdf
- https://cdn.shopify.com/s/files/1/0428/6794/9724/files/25883234636.pdf
- https://cdn.shopify.com/s/files/1/0433/7877/0078/files/napogezugigivu.pdf
- https://cdn.shopify.com/s/files/1/0434/7697/5768/files/strategic_thinking._download.pdf
- https://cdn.shopify.com/s/files/1/0431/8865/0142/files/pajukujixidedumunu.pdf
- https://cdn.shopify.com/s/files/1/0429/6795/7658/files/87091820213.pdf
- https://cdn.shopify.com/s/files/1/0433/3414/0056/files/69906483020.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vevisip.pdf
- https://cdn.shopify.com/s/files/1/0432/2865/9874/files/zatula.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000450d.binee7d9905a7e7d97afd0ab93a2665fc7e485c81063ba83c4ad74273fbd49c64a1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x450D | 5868 bytes |
font_01_sfnt_off000058ed.bin1d531f86db8365d5b932e10173059557e4ca8e955ad0f406288b17fc80e1ef59 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x58ED | 10388 bytes |
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