Malicious PDF — malware analysis report

Static analysis result for SHA-256 f23db8c09ee86ad3…

MALICIOUS

PDF

44.2 KB Created: 2020-11-04 01:15:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37b6326b75bf69224fc3e942625d2a9b SHA-1: 942f60966453f83ea496fbeda61a47cccb9c9c53 SHA-256: f23db8c09ee86ad369726007b34a70769e77c4a2a6cb5123fb36240dcae8656d
94 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised with a lure related to 'shark tank keto diet pills ingredients'. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded link suggest an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/123?keyword=shark+tank+keto+diet+pills+ingredients
    • https://cdn-cms.f-static.net/uploads/4383131/normal_5f96e0d61ff59.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bidurudilidujug/summit_view_elementary_independence_ky.pdf
    • https://s3.amazonaws.com/zomuzigo/mewejun.pdf
    • https://uploads.strikinglycdn.com/files/97ef60e5-a6dd-411f-85a5-cf04bce186ec/sojamilebonesafi.pdf
    • https://s3.amazonaws.com/lewuli/34684791081.pdf
    • https://uploads.strikinglycdn.com/files/b5cdaf94-f441-464b-94ca-e9ca0b03c302/70009276024.pdf
    • https://uploads.strikinglycdn.com/files/05554e5e-c48f-43aa-aee8-972ac9834f21/39498773235.pdf
    • https://uploads.strikinglycdn.com/files/f27d899d-3bf1-44ac-9f67-c24a51bbcefa/fetolapovex.pdf
    • https://s3.amazonaws.com/bejexe/gta_5_installer_free_download_for_pc.pdf
    • https://uploads.strikinglycdn.com/files/0e82bd50-271b-49ef-866f-9a76de360495/gexotesiliwibodibakatu.pdf
    • https://s3.amazonaws.com/gofilafixu/49317540650.pdf
    • https://uploads.strikinglycdn.com/files/66b7a59d-ab4f-4e4a-877b-cda3a79f229f/write_3.25_as_a_fraction_in_lowest_terms.pdf
    • https://s3.amazonaws.com/levumoduf/assembly_point_logo.pdf
    • https://uploads.strikinglycdn.com/files/435de2fa-73df-4156-a580-d337c630610b/slip_or_trip_argument_writing.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_off00006d6d.bin
8db64c084ad6ce1f63c49a0730a28bc6d700dcd36977f73c72815701cfda817d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6D 5388 bytes
font_01_sfnt_off00007fb6.bin
a91c5cf14aec6ce71ca94ae544670a4d7cef3eef612535ea58a1f4e65edc251b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB6 10500 bytes