Malicious PDF — malware analysis report

Static analysis result for SHA-256 f88d03fa2e7f4460…

MALICIOUS

PDF

41.2 KB Created: 2020-10-06 14:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 6b37ebf40755e3ba85bcfce94a847b81 SHA-1: 665f8cef8b947c690aeb937f470016b3a0f1dc03 SHA-256: f88d03fa2e7f44606daccee9a9dda31f73e741e3d63f0aa6bbaf2267b0d72ca5
124 Risk Score

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 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/pify?keyword=words+to+describe+great+poetry In PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/7215799993.pdfIn PDF document text
    • https://site-1039649.mozfiles.com/files/1039649/setuzixo.pdfIn PDF document text
    • https://site-1042501.mozfiles.com/files/1042501/77818026449.pdfIn PDF document text
    • https://site-1037187.mozfiles.com/files/1037187/sabaxigex.pdfIn PDF document text
    • http://files.warleyseniors.co.uk/uploads/1/3/1/4/131409761/bijikitusekelobowa.pdfIn PDF document text
    • http://files.cunninghampeaches.com/uploads/1/3/0/9/130969851/pedupopej.pdfIn PDF document text
    • http://files.dengkechen.com/uploads/1/3/1/1/131164246/1695859.pdfIn PDF document text
    • http://vuwamaweg.mcloughlansupplies.com/uploads/1/3/0/8/130814292/jovasete-padejanuwere-divitikos-vanuruva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9303/3111/files/barnett_vortex_youth_bow_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4532/9832/files/33035483791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0499/1400/files/budgeting_planning_and_forecasting_software.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8475/0743/files/masterchef_season_10_episode_11_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1c76cec-a819-4875-8b7c-78c2129dfc03/zeramur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5958adde-d1e8-4ffb-9e67-4281e890736f/zinulubuvujuxukitusom.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_off0000638d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638D 5464 bytes
SHA-256: 053d64c481f67674a527b198fea2dccdd23dc0e5895bad07b3e4c4db5718adb5
font_01_sfnt_off0000763f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x763F 9916 bytes
SHA-256: 4f66be2723df1b4b2d81acf0c1bf9e27897998aa6c543d5b70ebccec465ba08d