Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae3e398e9822481…

MALICIOUS

PDF

69.0 KB Created: 2020-12-21 21:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ada81ddf37e6968b446bd27db200d90 SHA-1: 122119eeb54ce98044fb859e861333916e71a41a SHA-256: 6ae3e398e98224819f8347696e52b568fe19c29b48462ba540c58812b01ebd0d
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a high ML score. The document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://gettraff.ru/123?utm_term=darien+public+schools+calendar+2020, which is likely used to redirect users to further malicious content. No scripts were extracted, but the presence of numerous links indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=darien+public+schools+calendar+2020
    • https://visimivaxel.weebly.com/uploads/1/3/4/7/134714962/3ccf4.pdf
    • https://vimasavugaf.weebly.com/uploads/1/3/4/5/134587410/4952232.pdf
    • https://cdn-cms.f-static.net/uploads/4410027/normal_5f9b315054df5.pdf
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/b3f46712be6.pdf
    • https://cdn-cms.f-static.net/uploads/4418984/normal_5f98f3d9e08cd.pdf
    • https://cdn-cms.f-static.net/uploads/4405430/normal_5faec4d421f36.pdf
    • https://cdn-cms.f-static.net/uploads/4477873/normal_5fd3aacb7b69b.pdf
    • https://xibopenevitamog.weebly.com/uploads/1/3/4/4/134488628/talaruzemuxatit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nakevoja/manual_usuario_alcatel_lucent_4039.pdf
    • https://uploads.strikinglycdn.com/files/8def61fc-0323-409b-8f81-8eece4a9047a/lutuvores.pdf
    • https://s3.amazonaws.com/pozokimepe/20900955594.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bada.bin
d9402335a2a5972a9febd19a9674f5e1112d2cd5318e5f5d4810c378ea39b5b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBADA 5572 bytes
font_01_sfnt_off0000cdbe.bin
d21fe84314f8dbfd82102aac4da94b720c0d5e8dd0b1f457fe75cbe2d9119a98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBE 10604 bytes
font_02_sfnt_off0000f1ce.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CE 16204 bytes

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