Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aaa6440f84471c9…

MALICIOUS

PDF

60.9 KB Created: 2020-11-26 17:12:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fd65afab986c4686c8e62eb10838b84a SHA-1: b96c2efa5445b03df74937e3eb6cc67600283ef3 SHA-256: 3aaa6440f84471c9c00bea05843bd72118ce514706e1dc69b195583d53a43e70
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'. This indicates the document's primary purpose is to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/strik?utm_term=2005+honda+element+mods In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369788/normal_5f9d2886d92de.pdfIn PDF document text
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/migodo-xidupogibejixe-wozijasiwukifo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384819/normal_5f923b98c6131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481662/normal_5fad750fd4e82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f86fa3a91736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393754/normal_5fa6744beb32d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/242b739b-50f5-4142-a0f7-62e9bb3d27e6/57711658838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72d52b6a-70ff-4c78-b649-eb90246f25a7/world_record_on_toss_the_turtle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80354534-b6a8-42a1-9f5f-70941aa988ea/devukenazewo.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/effects_of_alcohol_on_academic_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1747266a-251e-4bc8-8203-9c76b6921edb/fifa_11_apk_game.pdfIn PDF document text
    • https://s3.amazonaws.com/takeju/quick_shortcut_maker_apk_mirror_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38c21f5b-9a09-4ecc-9a73-161581b91c78/26118923059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eac3691-e751-47db-bfd3-105c46e601d9/99936651283.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB223 5272 bytes
SHA-256: ab864b2bfdae8cfc48580e87954fada6e25085de8d52ba7616535a6959511e51
font_01_sfnt_off0000c3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3EC 10248 bytes
SHA-256: 06f6a0b2806002d66eb36608d3cc38a5e955f8b9423cf3685b8962a0207dc784

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