Malicious PDF — malware analysis report

Static analysis result for SHA-256 01736a960825cbc3…

MALICIOUS

PDF

67.6 KB Created: 2020-11-20 02:00:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03f47b109ba2690b0298d103123278ac SHA-1: 1a8f72e9b5563dc1886f7309e9912d46212d9bf9 SHA-256: 01736a960825cbc3e793d39b1de388fcb5022800c24f671368da58fb61636354
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, https://traffmen.ru/strik?utm_term=business+professional+ethics+for+directors+executives+accountants, is the primary IOC and is likely used to lure users to a malicious site.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=business+professional+ethics+for+directors+executives+accountants
    • https://cdn-cms.f-static.net/uploads/4453329/normal_5fb608eab68a7.pdf
    • https://cdn-cms.f-static.net/uploads/4379851/normal_5f9b5456bc44c.pdf
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f94982e7e5bf.pdf
    • https://cdn-cms.f-static.net/uploads/4471095/normal_5fb7034dbd8d1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8a7e9167-8d41-41f7-8b95-048efd253565/89604785485.pdf
    • https://s3.amazonaws.com/didowugorokirug/26992527516.pdf
    • https://uploads.strikinglycdn.com/files/bab5cd87-e427-4f94-8c6d-55d58e043b7b/reddit_game_of_thrones_torrent.pdf
    • https://uploads.strikinglycdn.com/files/d5c7390b-1ab6-4d24-b4e8-d8db5171a632/42921764520.pdf
    • https://s3.amazonaws.com/dogazisuze/33311658696.pdf
    • https://uploads.strikinglycdn.com/files/b84c4183-a5c7-48b2-8805-e21f71141db4/32525643238.pdf
    • https://uploads.strikinglycdn.com/files/10ea6b56-e67b-498f-ae38-9716fe21e73e/happy_new_year_2020_to_post_on_facebook.pdf
    • https://uploads.strikinglycdn.com/files/ca2f21c8-c865-4f9e-af80-27efdea8bc88/77424954023.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_off0000cd9c.bin
9f61fcd8d2b4067a0067ef1e8f5f9119acd00af505c50b4784bfd70732579dd1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9C 5420 bytes
font_01_sfnt_off0000e008.bin
6df7bfa4a1e5627e9d345595ed7011aca3042ce7df6e62ad9910ba16d25cba20
pdf-font-stream PDF embedded font (sfnt) at offset 0xE008 9724 bytes