Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1a24e21c65524c…

MALICIOUS

PDF

72.0 KB Created: 2020-12-17 01:36:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69ba57ac2f014919a0d7308cd4629531 SHA-1: 66a1cd09ea137caa1782c60fb5c94cf91400ff6e SHA-256: 3c1a24e21c65524c12770ad83843cfe7bd8a7c62c5232e188cb67d22fb3837f9
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, specifically `https://gettraff.ru/strik?utm_term=samsung+galaxy+s8+metropcs`. This URL is associated with phishing and malware distribution campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

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-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/strik?utm_term=samsung+galaxy+s8+metropcs
    • https://cdn-cms.f-static.net/uploads/4494668/normal_5fb466629f707.pdf
    • https://cdn-cms.f-static.net/uploads/4370263/normal_5fbcc30ae66ec.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/felasorarabipis/probability_lesson_plans_high_school.pdf
    • https://static1.squarespace.com/static/5fc0e9eb3398ff75152e2002/t/5fc50cc1fa04221c71bf6ecb/1606749379478/16186001775.pdf
    • https://uploads.strikinglycdn.com/files/5670c0e8-7610-4272-8279-2f09d6248fa9/29051636786.pdf
    • https://s3.amazonaws.com/pusori/el_dorado_springs_mo_police_reports.pdf
    • https://s3.amazonaws.com/zosevid/light_bot_source_code.pdf
    • https://s3.amazonaws.com/fogibi/74616125900.pdf
    • https://s3.amazonaws.com/wewuxuviwar/balupu_full_movie_in_tamil.pdf
    • https://s3.amazonaws.com/jevelel/chest_guidelines_anticoagulation_after_surgery.pdf
    • https://uploads.strikinglycdn.com/files/f724f774-0967-4e09-9c92-d7744cc1d26d/5514341603.pdf
    • https://uploads.strikinglycdn.com/files/f556049e-cc5a-4f52-a16b-cc45629ba5d3/quickbooks_web_connector_api.pdf
    • https://uploads.strikinglycdn.com/files/b7ab6d14-2c7c-4111-b766-ef0a1158336f/sample_of_cultural_identity_essay.pdf
    • https://static1.squarespace.com/static/5fc0c666116eb00e3c4b5099/t/5fc636355147b148040625a0/1606825525806/adobe_photoshop_fix_premium_mod_apk.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.

FilenameKindSourceSize
font_00_sfnt_off0000dc3b.bin
47c2f455636148eab26ca53ebea3fde67c8899179d79516932534e7cb92ba3e5
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3B 5720 bytes
font_01_sfnt_off0000efac.bin
32f1d63372b749088a56331425b1b77acac946e35a6e1aa1f2406b64857981a3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAC 10556 bytes