Malicious PDF — malware analysis report

Static analysis result for SHA-256 f889dc475be79839…

MALICIOUS

PDF

65.1 KB Created: 2020-11-20 14:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 682ca01cc41b6f44e4facd8c8fdf44f0 SHA-1: 7e4b9a19a7e7705eaca80c176585f3a7aa8bb725 SHA-256: f889dc475be79839688ce03b6626b760a529a0943a59b736fc5e8e2d8218839d
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 'traffine.ru'. This indicates an attempt to redirect the user to a malicious site, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/123?utm_term=velveeta+broccoli+cheese+soup+instant+pot In 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/b52b6c91-67f0-4e92-858b-3119ee9b2da4/nopisamokemagugil.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/asphalt_8_for_pc_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/479fb780-f617-4ac7-bc0e-f24fca468888/fobipedukutoferuzinaka.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/jozugigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d138403-247f-4533-9814-457952d84fdb/caffeine_nicotine_and_adhd_a_guide_to_maintaining_sanity.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/carinosa_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f330b574-51e6-4645-a991-73058bf4ee47/30561282242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb59707-b008-4c16-84de-6bceb7ed7816/tara_charendoff_trump.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/causes_of_obesity_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86bca1c4-ab38-478e-84a0-f038d9656891/nemuf.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/tv_shows_unblocked_weebly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25583c0f-cdee-42eb-8f2a-94bfc98f0cf5/the_isle_progression_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d805af-d1f0-451f-8280-94d30cf3040f/newport_red_100s_coupons.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/4556799033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94c6a036-b039-4dbf-ace1-76cf8f47f8b3/92056391162.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_off0000c2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2DA 5184 bytes
SHA-256: 31d0eb34d754b04b4ec746664210ecbfd720daf891f8a70e146a525f8ecd1aa2
font_01_sfnt_off0000d47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47B 10280 bytes
SHA-256: 20b78d723d3f7d4c1b1f628d9e069a3354041943a3ddf928a9e2a02ba34d22f3

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