Malicious PDF — malware analysis report

Static analysis result for SHA-256 2361867d4637bc9f…

MALICIOUS

PDF

47.1 KB Created: 2020-10-10 23:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 89d516f96359a50d615dfee1060715a1 SHA-1: e6e5106f618149ed37f56c02dee7dd31837e2298 SHA-256: 2361867d4637bc9f985c7fde8eb068f0a0bedf775efe3629aa8f2db45947fb4c
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'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link suggest an attempt to lure users to malicious content, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://ggtraff.ru/pify?keyword=analysis+of+themes+in+macbeth In PDF document text
    • http://files.hbprovisions.com/uploads/1/3/0/7/130775320/8777556.pdfIn PDF document text
    • http://files.monicavilhauer.com/uploads/1/3/2/6/132696178/xobepefapirix.pdfIn PDF document text
    • http://files.pahasapagrotto.com/uploads/1/3/1/4/131438825/4af6be7a.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/bd90ac97-bc67-47a8-a1ec-a05b168554be/61028669684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f0be7fc-3376-44c8-a3f3-6b168a1f8753/nigisijiboj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a42acbb6-e942-40c4-9ef7-4464d33edb97/83148835343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f66a9a50-5a6c-4a81-ad71-1b35017bdd64/6377271151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/908bd08d-e1ec-4391-b336-ec4d4e354fe4/sosobuzenogoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8007/6446/files/wibejaduvakej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3797/4950/files/matlab_vs_python.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb6b86e5-0a18-4157-bc6c-5faa14a764e8/22753856621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c5dad1e-2b08-4429-9e8c-5079c70fb01e/21082868368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebd51f15-3f19-481c-8ce3-a6c759299bc4/nodib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/601dacd0-478f-44fa-ab10-92048cf0def8/kobekemenunivijexiburumeb.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_off00007bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD7 5256 bytes
SHA-256: 4cbbd5bb53886586532d9d2d4e42f8c7114038d0dabe0215cb4f55f941bc32ad
font_01_sfnt_off00008d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9A 9972 bytes
SHA-256: bd68a10df4b901b256845a439bd645e420fb610b105c9db0410b594ff7f514bf

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