Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c0d9bd84e0899e…

MALICIOUS

PDF

75.1 KB Created: 2020-12-28 09:14:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2b17b034560ec8683e170b716c75fc0f SHA-1: 7b9e756b67456cae3c36ec4bb0ee6f63ef3db3d1 SHA-256: c3c0d9bd84e0899ed3181550445d26d9f109975a12cd7a1daa892e12b178f695
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'traffine.ru'. This URL is likely used to redirect the user to a malicious site for phishing or to download further malware. 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-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://traffine.ru/aws?utm_term=excel+lookup+list+sheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406229/normal_5f9609f36f7b0.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/8hcpiho/crossing_the_chasm_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/pYK5Rge/bukekamakixabibajamif.pdfIn PDF document text
    • https://cdn.sqhk.co/liwewajawab/jcicF6a/15698793594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f8ed692a1242.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403952/normal_5f918654bde95.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/a62d423f-7981-40dc-b3a1-277fa2868ed8/100_octane_fuel_finder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1408770-c36f-49cb-bd55-e51031e9fc8d/96295294292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5584718c-889f-4ec9-ad81-8dbfe8d1885a/29922248596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84b31047-8d88-4665-b7ca-93b83102133f/clip_on_pedometer_target.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b74479-308e-481f-ba0a-1c40047a8588/zombies_timeline_transcript.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_off0000eb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB59 4804 bytes
SHA-256: 80484fa5d5c55c81af8e62c356962e249340c73fa6ea1a0a1e49d94a6f4e7c71
font_01_sfnt_off0000fbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBD 10476 bytes
SHA-256: 46251e479eef4e8224173cdd298ce13ddacc38e1cfbd2f994c13c12102f7131c