Malicious PDF — malware analysis report

Static analysis result for SHA-256 bafa7dd786d1fb8a…

MALICIOUS

PDF

73.6 KB Created: 2020-12-18 02:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 051d03838a087d691d73c3d3ca209ea0 SHA-1: 7fc0923e62c160e28d3811324bdf2b1fc004c74d SHA-256: bafa7dd786d1fb8a14cc7b630165ae6113e7995c4938409a8e294ba131463f22
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'. The document body, though heavily obfuscated, contains text related to 'School of the arts application rochester ny', suggesting a phishing lure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://traffmen.ru/123?utm_term=school+of+the+arts+application+rochester+ny In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385887/normal_5fb779272f30c.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/2a774b77-8d68-4edc-80a8-720919f0f3c3/30700536489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf7ef925-a8ac-4c7f-89bc-3dee08e2333f/34992421958.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55c6cbdb33045eedfea47/t/5fd691b7226e9048fabe0aa5/1607897536140/cool_wallpaper_hd_1080p_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c04f64a2-bc09-4c28-9dcf-22736f09281a/8220833771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4b1c164-580e-4630-b877-831ef8285193/bidusuzorodameseni.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc509327848ba205d335311/t/5fd6eb9ed654060362dc8197/1607920545471/3695720512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/067bba90-6c48-4bed-8428-1cf41fe209a6/mirezatibo.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_off0000e3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C0 5308 bytes
SHA-256: 120d5c92aa9ada22a9f39ac9c0010281b3e4d8102e4eea5344f704c0e9677882
font_01_sfnt_off0000f5d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D9 10516 bytes
SHA-256: 7f6e785f4d6e3b3662ed8e575a2d60885e95de199cb4232d01dc5e27d1eb5a4e