Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ea6644b01d3924…

MALICIOUS

PDF

74.4 KB Created: 2021-01-11 22:58:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9c795deaeac131a9fead07d5cb594fb4 SHA-1: 20dbd1748dbb8a9b617107e11565cd2e1df03142 SHA-256: b0ea6644b01d39249be9c64a847fa9ccb1742d19235b63d1fb14783ad5c4023a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics and an ML classifier. It contains embedded links pointing to known malicious redirector infrastructure, specifically 'ggtraff.ru'. The document body is heavily obfuscated, but the presence of these malicious links indicates an attempt to lure the user to a harmful destination, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/wb?keyword=90s%20dance%20music%20hits%20to%20listen%20to%20music In PDF document text
    • https://cdn.sqhk.co/kisereta/ajfxjhf/aws_s3_vpc_endpoint_private_dns.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374835/normal_5ffae777b94fd.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/jhyLdHN/diced_menu_nutrition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387230/normal_5fb4911b5bafe.pdfIn PDF document text
    • https://zujujoweb.weebly.com/uploads/1/3/5/2/135297083/8244746.pdfIn PDF document text
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/9436321.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/FgihjYu/koviwexurunomidakuvokizon.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/cSiiTgi/fun_literacy_games_ks2.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/085e8efba9fb565.pdfIn PDF document text
    • https://melekutiruj.weebly.com/uploads/1/3/2/7/132740408/gunuvuvixotobuna.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jipowumat/reduce_background_opacity_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/92360348692.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/mere_veer_bhagat_singh_dj_song.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/60927958714.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FD 5168 bytes
SHA-256: dfcb186ce80b0e499386a0b773917adba08581f5af1aabac36a017d1c1cb3d58
font_01_sfnt_off0000eb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB55 10360 bytes
SHA-256: bf675fbb2dae939a7db13bd9b4016710cad6fc4a8eda5fba92ab01ec51598d97
font_02_sfnt_off00010ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBB 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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