MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains a large number of embedded links, many of which point to suspicious or malicious redirector infrastructure. The ML classifier strongly indicated maliciousness, and the presence of a known malicious redirector URL reinforces this. The document body, though heavily obfuscated, contains text related to worksheets and URLs, suggesting a lure to external content.
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=subtracting%203%20digit%20numbers%20worksheet%20pdf
- http://files.khuloudkonsultancy.com/uploads/1/3/0/7/130775712/c7b2f501358a.pdf
- http://files.thomasrupertcharliebeal.com/uploads/1/3/1/1/131164573/b97df76a88b8.pdf
- http://files.stickemupracks.ca/uploads/1/3/1/1/131163867/gotunugodise_dubewawaloxav.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0429/2342/5955/files/mimop.pdf
- https://cdn.shopify.com/s/files/1/0428/3518/1724/files/16618930163.pdf
- https://cdn.shopify.com/s/files/1/0429/7264/3491/files/napujeguwuka.pdf
- https://cdn.shopify.com/s/files/1/0434/4017/7317/files/domorazigo.pdf
- https://cdn.shopify.com/s/files/1/0434/5223/5938/files/66941711491.pdf
- https://cdn.shopify.com/s/files/1/0438/7805/6091/files/66336373450.pdf
- https://cdn.shopify.com/s/files/1/0434/0485/3406/files/8285518587.pdf
- https://cdn.shopify.com/s/files/1/0434/7173/2889/files/72884751888.pdf
- https://cdn.shopify.com/s/files/1/0429/2398/3001/files/lawesilubu.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86477918810.pdf
- https://cdn.shopify.com/s/files/1/0433/9938/1157/files/77936714362.pdf
- https://cdn.shopify.com/s/files/1/0430/7258/5888/files/90163412911.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_off00005ed8.bin6f0aca57e988dcc716d0f82ee923cd586659cb98b7dad2f890a236acf729ee80 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5ED8 | 6100 bytes |
font_01_sfnt_off0000737a.bin838a57b5f2ee1b64856d6e90e0ffbb820cd4c29fc73c4c9c3681a3ee27113f1a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x737A | 9772 bytes |
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