Malicious PDF — malware analysis report

Static analysis result for SHA-256 356bd32e97d18996…

MALICIOUS

PDF

67.5 KB Created: 2020-12-19 20:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14a77ea0aa8eab2268a747930c7b88eb SHA-1: d1e7eb170074cc453ab60c8f1c70193eddd0be80 SHA-256: 356bd32e97d18996bcc7af77de10485e17edcaa3240b7430bc38d981afab6bd9
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 URL is likely used to redirect the user to a malicious site or to download a secondary payload. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL indicates a phishing or malware distribution attempt.

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://traffmen.ru/123?utm_term=changes+an+anthology+of+short+stories+pdf+download
    • https://static.s123-cdn-static.com/uploads/4478393/normal_5fcd72cd2dfa3.pdf
    • https://cdn-cms.f-static.net/uploads/4491164/normal_5fbb01404428a.pdf
    • https://cdn-cms.f-static.net/uploads/4471083/normal_5fa3c7994507c.pdf
    • https://cdn-cms.f-static.net/uploads/4375204/normal_5f8f585c12746.pdf
    • https://cdn-cms.f-static.net/uploads/4403951/normal_5f9f8344c86ba.pdf
    • https://cdn-cms.f-static.net/uploads/4475562/normal_5fd14cb7c7332.pdf
    • https://static.s123-cdn-static.com/uploads/4481280/normal_5fc681fb1bf63.pdf
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5fa8aabcb7a55.pdf
    • https://static.s123-cdn-static.com/uploads/4416500/normal_5fc8977263cae.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc19336affbf90a66ef41a3/t/5fce20f47ae85b53b2ba79a7/1607344377925/health_wellness_health_newsletter_articles.pdf
    • https://uploads.strikinglycdn.com/files/9635fd11-0a4f-4380-ae12-aee405b2839f/54997059967.pdf
    • https://static1.squarespace.com/static/5fc5d7af3398ff75154fabb7/t/5fd6d53972b1137fa98734a3/1607914813070/33089888843.pdf
    • https://static1.squarespace.com/static/5fc791dd6879d031da12c5b5/t/5fcf59507c36362741adfee0/1607424338607/sync_icloud_contacts_with_outlook_windows_10.pdf
    • https://static1.squarespace.com/static/5fc2b80e5bcb0228a28e2589/t/5fc4dbca61e25426e1d0975f/1606736844068/bennetts_military_supplies.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_off0000cba8.bin
04645e7d6ff371196032d8b85c706e939fe51c0f6e5d0d037e84f71544519bc9
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA8 5404 bytes
font_01_sfnt_off0000de1a.bin
05944d77fac0656e4589214886c5e8f3b99106759f1aa407273982fae4edc42e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1A 10592 bytes