MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.com/pify?keyword=chst+study+guide+pdf'. The document body, though heavily obfuscated, contains text suggesting it is a 'chst study guide pdf'. The presence of numerous embedded links, many pointing to Shopify domains hosting other PDFs, indicates a link farm designed to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.
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.com/pify?keyword=chst+study+guide+pdf
- http://files.charlesinfurna.com/uploads/1/3/1/8/131856134/23583.pdf
- http://files.alissaellisphd.com/uploads/1/3/1/4/131452827/844207.pdf
- http://files.vintageedinburgh.com/uploads/1/3/1/4/131483361/064474de91c.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0431/5276/9192/files/jikapifezi.pdf
- https://cdn.shopify.com/s/files/1/0434/9027/9574/files/39343864978.pdf
- https://cdn.shopify.com/s/files/1/0431/0712/3357/files/85551636202.pdf
- https://cdn.shopify.com/s/files/1/0429/5557/1356/files/34398710080.pdf
- https://cdn.shopify.com/s/files/1/0431/6151/8231/files/sawubuvalul.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.pdf
- https://cdn.shopify.com/s/files/1/0430/9798/1082/files/91083289995.pdf
- https://cdn.shopify.com/s/files/1/0428/2531/8563/files/82286246405.pdf
- https://cdn.shopify.com/s/files/1/0435/1849/2824/files/eager_beaver_wood_chipper_parts.pdf
- https://cdn.shopify.com/s/files/1/0433/4062/8136/files/20121695504.pdf
- https://cdn.shopify.com/s/files/1/0435/2809/3856/files/20877519672.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_off00007c43.binc111132e9db7d7c2526006a1de321df3b6122ebbda1d6525985e7aa08330d360 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7C43 | 4972 bytes |
font_01_sfnt_off00008d38.bin58e778526154ce285edf573eb94c8da0ad431e948d60dee03b08acf641b078e0 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8D38 | 10720 bytes |
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