MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.001 Malicious Link
The PDF 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 firing indicates a direct redirect to a known malicious URL, 'https://ttraff.ru/wb?keyword=classroom%20phrases%20for%20students%20pdf', which is the primary indicator of malicious intent. The document body, though partially corrupted, contains text related to 'classroom phrases' and the PDF creation tool, likely serving as a lure.
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.ru/wb?keyword=classroom%20phrases%20for%20students%20pdf
- http://files.mrshanksclass.com/uploads/1/3/0/9/130969987/zuban.pdf
- http://files.jamesgoldgeier.com/uploads/1/3/2/3/132302966/ribeso-zagemokelu.pdf
- http://files.kocanada-usa.com/uploads/1/3/1/4/131437538/zorodoke.pdf
- http://files.heavencanbefound.com/uploads/1/3/1/3/131384018/tizalunovemili.pdf
- http://files.theearnestoptimist.com/uploads/1/3/1/8/131871954/fac4d7.pdf
- http://files.gotnlc.com/uploads/1/3/1/4/131454306/fogiz.pdf
- http://files.madebyloulou.net/uploads/1/3/1/8/131871891/59bfb6ba928ffb6.pdf
- http://files.rosebudpreschool.org/uploads/1/3/2/8/132815960/c2e6ffd9277c.pdf
- https://kanagop.files.wordpress.com/2020/06/97006527957.pdf
- https://dojobavoviz.files.wordpress.com/2020/06/kumujapomokemo.pdf
- https://toposimijiv.files.wordpress.com/2020/06/45537406353.pdf
- https://nenusanej.files.wordpress.com/2020/06/nusagosivuzuvojusutix.pdf
- https://zusuxomo.files.wordpress.com/2020/06/nerej.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87913440599.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25322908130.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedepisolutiri.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jedajuzosefowi.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/
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00006d73.bin6c51e5ea0d723b7620c9487e312d17e71b5d342d37f4718fc960f1cff3930868 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6D73 | 5136 bytes |
font_01_sfnt_off00007ec2.bina5fa05fbff8f6a2357b016b7394bd68c84ed4cf5eff8a8ff3ea651c35b96690c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7EC2 | 10656 bytes |
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