PDF malware analysis — malicious · d79c1b5e632d37f7

MALICIOUS

PDF

80.9 KB Created: 2020-11-13 07:05:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9b9d0b84a49e0382cffc884263306740 SHA-1: d7dd22312d76c07ae24eeb88c4c848a5f378c12e SHA-256: d79c1b5e632d37f72937d46d84151f63791a2c4362f2fdf6611c611cba2e93ff

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL suggests an attempt to lure the user to a compromised site, likely for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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.
ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://traffmen.ru/123?utm_term=greatest+common+factor+worksheets+free
- https://cdn-cms.f-static.net/uploads/4391305/normal_5fad9d8a6c816.pdf
- https://cdn-cms.f-static.net/uploads/4420756/normal_5faae71457412.pdf
- https://cdn-cms.f-static.net/uploads/4386080/normal_5f992b6c260dc.pdf
- https://cdn-cms.f-static.net/uploads/4367305/normal_5f8f95233ee6a.pdf
- https://cdn-cms.f-static.net/uploads/4368760/normal_5f93247930d0d.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/140c1553-082e-4c96-a70e-f4a8eff6546c/sidarezipoxajovugupi.pdf
- https://uploads.strikinglycdn.com/files/c61a7b21-7665-4765-8e46-a52849a60444/jewurukosibotedu.pdf
- https://uploads.strikinglycdn.com/files/4c26e065-3551-4949-9d0b-6ef4d074a4ff/sofekekamasulu.pdf
- https://s3.amazonaws.com/fajeloninesitel/neumonia_viral_pediatria.pdf
- https://s3.amazonaws.com/rebesudanolo/cara_membuat_cv_lamaran_kerja.pdf
- https://uploads.strikinglycdn.com/files/5667d23f-0bb1-477c-8a54-c72540c89828/lyrics_my_favorite_things.pdf
- https://s3.amazonaws.com/xumakomowi/loxukowidumanenu.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_off00010065.bin` `13f7edb1bc726fa320ee31690848692e3f298466439e3d38d5863c082609f796`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10065	5276 bytes
`font_01_sfnt_off00011242.bin` `1a2dd5e320031fec6b3ef9871dae3efac3095e36f45c00319e5cb2e19b879958`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11242	10760 bytes

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