Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8784eedd527ef28…

MALICIOUS

PDF

59.9 KB Created: 2020-11-04 16:22:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7ad938212be2546b3382b56d322f3f75 SHA-1: 9eb94d50ffe63fdc62b704266311f77d3e4a1335 SHA-256: a8784eedd527ef281263e123cf059c2600699cba9a3f8075b2736ef0e6b1fb7d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains numerous embedded links designed to redirect users to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The primary redirector URL is https://gettraff.ru/strik?keyword=dragon+ball+z+pictures+1080x1080, which is flagged as malicious. The document's structure and extensive linking suggest an attempt to manipulate search engine results or lure users to malicious content, likely as a precursor to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/strik?keyword=dragon+ball+z+pictures+1080x1080 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_5f91b5d76909c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_5f927ce644d3f.pdfIn PDF document text
    • https://ralubimuxafoku.weebly.com/uploads/1/3/4/3/134373731/8102645.pdfIn PDF document text
    • https://kujavubudiza.weebly.com/uploads/1/3/4/4/134497056/ab82979670bca5.pdfIn PDF document text
    • https://vunolevakedo.weebly.com/uploads/1/3/4/3/134317922/7160764.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/e411fc555300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389085/normal_5fa0f7358104e.pdfIn PDF document text
    • https://fawubanine.weebly.com/uploads/1/3/4/3/134321827/tonag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414867/normal_5fa0ba2f52c75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f8766c710348.pdfIn PDF document text
    • https://wilujogid.weebly.com/uploads/1/3/4/3/134347442/6b2795caeae16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393041/normal_5f90b7d95581b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/b18e3081-e72e-4c47-a8b9-0309a2c6fabc/14785887773.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A3 6588 bytes
SHA-256: 24fd6868f187b5667792517f9f69d22ac5a3de5011d4d3824467392effeade79
font_01_sfnt_off000088ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88EC 3120 bytes
SHA-256: 750d1396ea0bf5fbbfb1efa7800930e25a2e400cebbc542b316d66b1e2c172b3
font_02_sfnt_off00009421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9421 5744 bytes
SHA-256: 3e3272e7cb1bba21a86bdcebc6b8a6584dddc79da78e4ac891999205dd4af63e
font_03_sfnt_off0000a7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7CB 7200 bytes
SHA-256: 5c57d13b5b75888da21e3999d5055f21c5a56f0149692f3c2a345ed83788d9b0
font_04_sfnt_off0000bb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB85 11440 bytes
SHA-256: a8fa2163b5e496fe7eca95757a29759482667d40df57f18a92980238fab3906f