Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b6e41f8955c92f4…

MALICIOUS

PDF

70.4 KB Created: 2020-12-30 04:48:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 07d3ce7e02d3d69c01c72f353acd5285 SHA-1: 5e09fce85d296425094d464393f2e5682c541a6b SHA-256: 7b6e41f8955c92f47c2b7500430e1039ee5c90aeddd325aeb74a9929ebf652d8
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the URL 'https://gettraff.ru/strik?utm_term=dominos+party+specials' is associated with malicious infrastructure. The presence of numerous external PDF links suggests a link farm used for SEO manipulation or distributing further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/strik?utm_term=dominos+party+specials In PDF document text
    • https://bekaxerovesujes.weebly.com/uploads/1/3/4/8/134856890/nurimukazifelowipupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474222/normal_5fb62e5686bfb.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/djbNiey/36748307072.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485822/normal_5fb9cbe36db17.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/hiRjeEN/mudanotufabag.pdfIn PDF document text
    • https://debemalimuwu.weebly.com/uploads/1/3/4/3/134385929/ba94d2d962411a.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/1649329b-e342-444c-ab7e-ae829c697c12/human_physiology_immune_system_webquest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e30b872f-4da6-4d88-9fce-27f5f5b9408c/39235284620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17c15166-73e4-480f-aaed-16e508ed30cc/spin_tops_game_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/baterias_bosch_catalogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01ed0c7d-162b-446c-85d7-e317218a43c7/3527619866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b62b81f0-1f60-4bba-8143-54343f614be3/16923768161.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_off0000d474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD474 5180 bytes
SHA-256: 7b18bb4df2f4d322f7f3230e37e6ca745c6088930c0ecf1384e4659c0b77240b
font_01_sfnt_off0000e605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE605 11708 bytes
SHA-256: cf68c5908cd4ae827075a7e4bc525a9b6494bdf9b48760f5651d0637f9c72460

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