Malicious PDF — malware analysis report

Static analysis result for SHA-256 276d99548d2de60a…

MALICIOUS

PDF

78.2 KB Created: 2021-01-02 05:26:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43dd495e19b5cf87ec3014a36529bb75 SHA-1: 72f8c407452587407a29ada8651932249622264f SHA-256: 276d99548d2de60a0cc2ffb9dc123f26813471ce54ad4ac6a59669073bfae128
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 'ggtraff.ru'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of 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-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://ggtraff.ru/123?utm_term=conservation+vs+preservation+biology
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5fbb0be98ad1c.pdf
    • https://cdn.sqhk.co/zenetofuma/euhjaM5/wheel_of_fortune_casino_slot_machine_for_sale.pdf
    • https://cdn-cms.f-static.net/uploads/4369507/normal_5f9ff0f9ca13d.pdf
    • https://cdn-cms.f-static.net/uploads/4450501/normal_5fa6b8a7bef36.pdf
    • https://cdn-cms.f-static.net/uploads/4408706/normal_5f9dd84051e54.pdf
    • https://cdn-cms.f-static.net/uploads/4381104/normal_5f907a5e4860a.pdf
    • https://static.s123-cdn-static.com/uploads/4473322/normal_5fedd7cd4c16e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ef6c821b-c336-47a5-a17a-788473c0aeca/gokowepuke.pdf
    • https://uploads.strikinglycdn.com/files/6d8ed129-612c-4926-9c16-7bb83069e06f/poxomizajelanoxogapabo.pdf
    • https://uploads.strikinglycdn.com/files/a56c3350-6ae3-426c-9d6e-2e9a730b000c/72402890832.pdf
    • https://uploads.strikinglycdn.com/files/75eab841-656b-4e00-ac59-de9d36c3d5bb/display_generic_pnp_monitor_on_standard_vga_graphics_adapter.pdf
    • https://uploads.strikinglycdn.com/files/cbb96212-3444-4d8c-831c-563adfb06b25/garimarifataviguritetafe.pdf
    • https://uploads.strikinglycdn.com/files/5f2e8d79-3b6a-484a-b5ca-a5e2a5c84672/top_country_music_artists_2018.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_off0000f55d.bin
1f3bd53bb74c707fefda090d3a8fd5795ebf32b9a1298518cfd4f2b1f97d6c14
pdf-font-stream PDF embedded font (sfnt) at offset 0xF55D 5196 bytes
font_01_sfnt_off0001071e.bin
4afaedb2f3c2e4b7df5894174232183020ce22a84c07977fd2e65bbe66a3a9ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x1071E 10744 bytes