Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be8d046bf0e4fb3…

MALICIOUS

PDF

40.4 KB Created: 2020-08-31 22:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e0b0a9be75724c6294f8726438dfac7 SHA-1: f2f0ef8e35e450eb7e06423e68fc1ec01e1542dc SHA-256: 6be8d046bf0e4fb363457e74117f46fd1b8244ce99e5c647a688bae37629e789
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting a 'partnership proposal' lure, and the URL https://ttraff.ru/wix?keyword=partnership+proposal+email+template is directly referenced. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to distribute further malicious content.

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://ttraff.ru/wix?keyword=partnership+proposal+email+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/911c12_36174e89ea8d4719b00fc2ee42c1b39a.pdf
    • https://static.usrfiles.com/ugd/7e6083_3a5ed7fcd2f94afc966a15a1882da295.pdf
    • https://static.usrfiles.com/ugd/43d598_524c25077c73433cbc35594849386836.pdf
    • https://static.usrfiles.com/ugd/3aee12_23ddbd6886ed4454866e78f2f1e566ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d6113f6fb5540a5ba59512849ae614a.pdf
    • https://static.usrfiles.com/ugd/b8c837_5bf50ae1afd24b6fb38718fd7279e402.pdf
    • https://static.usrfiles.com/ugd/8b4172_c108b75fe08e405bb0827c3540e162e1.pdf
    • https://static.usrfiles.com/ugd/b8c837_369015d0020e4dee8665f1455887811e.pdf
    • https://static.usrfiles.com/ugd/b8c837_cad9da7fa409402b9399a38ecaa6359b.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/kisujatowilifulit.pdf
    • https://cdn.shopify.com/s/files/1/0434/3237/8517/files/35847711059.pdf
    • https://cdn.shopify.com/s/files/1/0452/8907/8946/files/bank_exam_free_study_material.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_off0000613f.bin
78cce9a0d58c8404653f2bcdb60445a8e851c6212dea6881385fed51581a10cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x613F 5060 bytes
font_01_sfnt_off00007248.bin
5bdfa31423058fd56996762b4c88639217da711115d62656cd0a61431505f0e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7248 9956 bytes