Malicious PDF — malware analysis report

Static analysis result for SHA-256 460f876e3ae41722…

MALICIOUS

PDF

42.2 KB Created: 2020-08-21 09:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 368a3a397de44295e427c5c72e6a8b20 SHA-1: c1bb82778ea192748536eabdba0139d3bba43d96 SHA-256: 460f876e3ae41722719319feb3acea1b79643a662cbecf69fe3064e118c8a3f3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, including a critical redirector URL, designed to lead the user to malicious infrastructure. The document body, though obfuscated, contains the text 'Normalizacion de base de datos ejemplos pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=normalizacion+de+base+de+datos+ejemplos+pdf
    • http://files.nottinghamuu.com/uploads/1/3/2/7/132740852/jaxutekop.pdf
    • http://zaborola.travisrebelband.org/uploads/1/3/1/3/131381464/338946.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/xuzuvararudifesokufavu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5363/7018/files/22516961712.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/azolla_cultivation_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0430/9775/1709/files/keeladi_excavation_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/7533/8389/files/gewof.pdf
    • https://cdn.shopify.com/s/files/1/0438/5941/1094/files/bafejezopulofoluzodumewu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/50482898261.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
    • https://cdn.shopify.com/s/files/1/0436/2466/1154/files/59840189743.pdf
    • https://cdn.shopify.com/s/files/1/0436/1990/9794/files/alimentacion_consciente_suzanne_powell_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0434/5747/8809/files/brahmanda_nayakuni_brahmotsavam_ringtone.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006223.bin
5642af35f76ef3069571acac792238890196aea1a08bfd9cbb157378bb723548
pdf-font-stream PDF embedded font (sfnt) at offset 0x6223 5536 bytes
font_01_sfnt_off000074e2.bin
7543afdae17d43bdf47bdc55bd87122c8a706878cf8ca6e0e2444953e2513c9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E2 11272 bytes