PDF malware analysis — malicious · 076784c93f8682f0

MALICIOUS

PDF

54.0 KB Created: 2020-10-28 21:45:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1aa68f6f9fecb91eb1be93cb320a2bcd SHA-1: 74ba942824ff81610967a01304503d065c6579f4 SHA-256: 076784c93f8682f00a30e2cf342eb774c4de0fb774b2cef1db3b4bfffa99fab7

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external PDF files, a technique often used for SEO poisoning or to distribute malicious content. One of the embedded URLs, 'https://cctraff.ru/strik?keyword=r.+kelly+the+buffet+torrented', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF 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.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small 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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The 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.
Embedded URL info EMBEDDED_URL

One 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://cctraff.ru/strik?keyword=r.+kelly+the+buffet+torrented
- https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/pagetapulurozu.pdf
- https://xefosujusiro.weebly.com/uploads/1/3/4/0/134042031/lefemugosapixer.pdf
- https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/f8931f.pdf
- https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/zigobezata.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/ruzumeb/terror_britannicus.pdf
- https://s3.amazonaws.com/dovulavavo/photoassisted_electrolysis_of_water.pdf
- https://s3.amazonaws.com/wilugugo/11841711788.pdf
- https://uploads.strikinglycdn.com/files/c2caa804-9d2b-4798-ba61-ee4061b43b8c/popuguj.pdf
- https://cdn.shopify.com/s/files/1/0487/9804/0229/files/mavimadawujajoxigajipira.pdf
- https://s3.amazonaws.com/sojebelevenex/59832231682.pdf
- https://s3.amazonaws.com/bepukuba/nerivep.pdf
- https://cdn.shopify.com/s/files/1/0494/4835/3959/files/the_secret_destiny_of_america.pdf
- https://uploads.strikinglycdn.com/files/c2570b77-c0af-4df8-85ed-7b451ebdcf2c/correcteur__avance_de_phase.pdf
- https://s3.amazonaws.com/sazariwapa/upsc_anthropology_syllabus_in_hindi.pdf
- https://s3.amazonaws.com/teximikamukubo/dreamweaver_cs6_tutorial_creating_a_website.pdf
- https://s3.amazonaws.com/jeduzizonox/theory_of_redox_titration.pdf
- https://cdn.shopify.com/s/files/1/0499/8597/8518/files/51796060138.pdf
- https://uploads.strikinglycdn.com/files/c88c2c4c-da97-4b5d-bbdd-cc02aa21e66b/vutasazerug.pdf
- https://uploads.strikinglycdn.com/files/31df517d-fcc5-4e68-b651-f018e4b44570/62194252858.pdf
- https://uploads.strikinglycdn.com/files/e3734533-0568-45a4-b7b1-6a7452aa0564/33958440013.pdf
- https://s3.amazonaws.com/henghuili-files/16834659663.pdf
- https://s3.amazonaws.com/sugaguxagu/22477994485.pdf
- https://cdn.shopify.com/s/files/1/0462/3876/1109/files/android_version_distribution_2020.pdf
- https://s3.amazonaws.com/nerugiraxura/calisthenics_beginner.pdf
- https://s3.amazonaws.com/xarojapi/rugozazuk.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_off00009310.bin` `4679643fc47a190854bfcd058b02e4f27cd169d25c18fad06d5c2eabde77ec4a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9310	4952 bytes
`font_01_sfnt_off0000a3f3.bin` `66bff9019a84f0d72a8f96a5e387fcdafabc7a3dd1f41e358337edc760f4782f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA3F3	11640 bytes

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