MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
T1204.002 Malicious Link
The PDF contains a large number of embedded links, many of which point to domains that appear to be part of a link farm designed to host malicious content. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains text related to trigonometry worksheets, suggesting a lure to disguise the malicious intent.
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/pify?keyword=right+triangle+trigonometry+worksheet+13-+1
- http://files.hacklebarneyfarm.com/uploads/1/3/1/4/131437982/xufagoxejatoxememi.pdf
- http://files.harbor-club.org/uploads/1/3/0/8/130814110/144a2daf.pdf
- http://files.sweetlifeyogastudio.com/uploads/1/3/1/4/131453486/b3334032.pdf
- http://files.operaunlimited.org.uk/uploads/1/3/1/0/131070207/57f276138.pdf
- http://files.dynamichealinghomeopathy.com/uploads/1/3/1/3/131380600/dejoponidometo.pdf
- http://files.dynamichealinghomeopathy.com/uploads/1/3/
- https://cdn.shopify.com/s/files/1/0432/3740/8936/files/93041336846.pdf
- https://cdn.shopify.com/s/files/1/0431/2681/6932/files/71709230078.pdf
- https://cdn.shopify.com/s/files/1/0430/2556/3799/files/96219089639.pdf
- https://cdn.shopify.com/s/files/1/0437/6900/4190/files/50838776449.pdf
- https://cdn.shopify.com/s/files/1/0433/0009/4112/files/94563890902.pdf
- https://cdn.shopify.com/s/files/1/0434/6236/1245/files/degunijupomekawezejid.pdf
- https://cdn.shopify.com/s/files/1/0428/1240/7967/files/vokurunumezuxoxel.pdf
- https://cdn.shopify.com/s/files/1/0434/9755/4084/files/fezimevidigopufogubasalig.pdf
- https://cdn.shopify.com/s/files/1/0430/4879/6309/files/87611150001.pdf
- https://cdn.shopify.com/s/files/1/0433/5904/3749/files/96324024842.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_off0000876b.binec8ae80ac229cee71c7e726ee8a82b8091b176f285493f16dbb04d909447c5ef |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x876B | 5400 bytes |
font_01_sfnt_off000099bf.binc4351ad2bbcd2f4155d20e66a1ad6d427be6161cf4a6c40dba14c38bf65aab72 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x99BF | 9812 bytes |
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