Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1cc56bdee58381…

MALICIOUS

PDF

69.1 KB Created: 2020-11-23 10:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dea2fd17a040369fdeaef917e4b17a1f SHA-1: 97ed4373cb60c3fac6e8c6ea970c06a4b1d69b9b SHA-256: 1c1cc56bdee583810462ff2db7869f76fed388b4c636f347e1197d4309c6a60a
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link to 'https://cctraff.ru/123?utm_term=.351+winchester+ballistics'. The ML classifier also flagged this PDF with a high probability of being malicious. Although no scripts were extracted, the presence of a malicious URL strongly suggests a phishing attempt to redirect users to a harmful site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/123?utm_term=.351+winchester+ballistics
    • https://cdn-cms.f-static.net/uploads/4421038/normal_5f9ed6de7bd5a.pdf
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5f9f7e8479a0e.pdf
    • https://cdn-cms.f-static.net/uploads/4379968/normal_5f99bce8a2090.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tutasujal/fagumilonizazirapa.pdf
    • https://s3.amazonaws.com/likerajatob/49393120722.pdf
    • https://uploads.strikinglycdn.com/files/71763e2c-3591-442a-b7f6-0a83cf030018/62078573338.pdf
    • https://s3.amazonaws.com/pisedij/ditag.pdf
    • https://uploads.strikinglycdn.com/files/005f513f-16f6-4cc3-b5b1-dbe334424bce/convertir_en_formato_apa.pdf
    • https://uploads.strikinglycdn.com/files/4ad9b1aa-200a-4791-990a-92ea4754d2d3/bajirao_mastani_hd_movie_mp4.pdf
    • https://s3.amazonaws.com/befevifa/88309812228.pdf
    • https://s3.amazonaws.com/vaxebisapesi/meters_to_inches_conversion_chart.pdf
    • https://uploads.strikinglycdn.com/files/c1784eb3-b778-4f9b-8ddd-1c9b57aa7716/win_xp_simulator_online.pdf
    • https://uploads.strikinglycdn.com/files/7e900d63-9698-445c-8cc3-04a6903b083f/cherry_pickers_guide_online_free.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_off0000d0ff.bin
0df98d741af2fd7e589b727a68555c9b109f7e900102a3d1b768bceaee0bb0a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FF 5396 bytes
font_01_sfnt_off0000e375.bin
284488e5bdd9c37908ab545c4f11a763dbe3cb7191c34607970b5b2010de9332
pdf-font-stream PDF embedded font (sfnt) at offset 0xE375 10588 bytes