Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7d2e7e5943fa54…

MALICIOUS

PDF

41.2 KB Created: 2020-10-02 01:34:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7936ab075952dc11f2ebbff6c8168b39 SHA-1: 6061881a1850d0d19f3b0ede989a48c6b7b8a6d8 SHA-256: 1f7d2e7e5943fa54d355e41554f5c6b5d063edb02a2d09f3b88b6bca8b4ff964
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to disposable hosting or known malicious redirectors, indicating a link farm or SEO spamming operation. The ML classifier strongly flagged this PDF as malicious. The primary malicious URL identified is https://gettraff.ru/strik?keyword=forgotten+realms+campaign+setting+3, which is part of a link farm designed to distribute traffic to other sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://gettraff.ru/strik?keyword=forgotten+realms+campaign+setting+3 In PDF document text
    • https://site-1038840.mozfiles.com/files/1038840/sobowewudolumufupunar.pdfIn PDF document text
    • https://site-1036713.mozfiles.com/files/1036713/96368506840.pdfIn PDF document text
    • http://files.quicknezautoleasing.com/uploads/1/3/2/6/132695238/wizimozud.pdfIn PDF document text
    • http://files.cherylmillar.com/uploads/1/3/0/8/130874496/1152727.pdfIn PDF document text
    • http://mafilovo.marinerscovethirdlake.com/uploads/1/3/1/4/131452976/2295575.pdfIn PDF document text
    • http://files.gladstonefirerescue.org/uploads/1/3/0/9/130969439/vudejukeroxebijix.pdfIn PDF document text
    • http://febufaju.markmarinozzi.com/uploads/1/3/1/4/131453574/fuvezefirigam.pdfIn PDF document text
    • http://sumif.californiaconcerto.org/uploads/1/3/1/3/131397970/7fbcbf6b.pdfIn PDF document text
    • http://files.ellewyant.com/uploads/1/3/1/6/131637014/jopelozodumu-dirivodiboxu-jovat.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/819f9a29-5638-4b3d-baa7-f93aa9632700/97953306885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b35cc986-5104-4ab5-a563-fa31313c36f0/65330539503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04f1e887-ab74-4536-80c7-81b31fee012f/38907395463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/800b3bb6-b4cd-4fdb-8a10-fb412ed6c832/37644745856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e60e548-ba4f-4d3a-8729-a878810a1544/bubuf.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_off0000634c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634C 5372 bytes
SHA-256: b4dd7d2ac6d4704ff379ff0fc4b43cd1b2d6c1890a7b9f174b320626cdcacb11
font_01_sfnt_off00007588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7588 10104 bytes
SHA-256: aaf396f872aaf96f81828d1ab51fcfa4d7b24519d96b106ae6e4efbda3c6c6c5

Open this report in the interactive analyzer, or submit your own file for analysis.