Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ee9102bc9c91de…

MALICIOUS

PDF

46.6 KB Created: 2020-10-09 05:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 66ac9e20db0285afab1e0795260124bc SHA-1: 55e637cc0ecf2de0ada8a3f38db2dbd9801255bb SHA-256: 62ee9102bc9c91deff3deebd57d471479759ff1a27b7276cfb8d2e91f0dca004
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, embedding numerous URLs that point to a malicious redirector. The primary malicious URL identified is https://ggtraff.ru/strik?keyword=cells+and+tissues+epithelium+coloring+worksheet, which is likely used to distribute further malware or phishing content. The document's structure and the high number of outbound links suggest a coordinated effort to drive traffic to malicious infrastructure.

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://ggtraff.ru/strik?keyword=cells+and+tissues+epithelium+coloring+worksheet In PDF document text
    • http://pewarel.shaysbeautysupply.org/uploads/1/3/1/0/131070627/2439912.pdfIn PDF document text
    • http://jokotez.woytowichdesign.com/uploads/1/3/0/8/130814328/babogawufirase_losonozenasap.pdfIn PDF document text
    • http://tuwibalas.countrychicksoaps.com/uploads/1/3/1/0/131070187/585d8822140.pdfIn PDF document text
    • http://zawobu.fhotosnearandfar.com/uploads/1/3/1/3/131383664/jawimezeforev.pdfIn PDF document text
    • http://files.texasja.org/uploads/1/3/0/8/130874115/86d28fed187.pdfIn PDF document text
    • http://bogawil.geras.sk/uploads/1/3/0/8/130814297/df1bc.pdfIn PDF document text
    • http://files.paintfactory.co.nz/uploads/1/3/1/6/131637257/7382513.pdfIn PDF document text
    • http://files.philsutech.com/uploads/1/3/0/7/130775653/4039fe966b4e74.pdfIn PDF document text
    • http://files.theartofpromotion.com/uploads/1/3/0/7/130775729/2550286.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/1/0488/2271/4533/files/discord_mee6_all_commands.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/75178103021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8432/6059/files/adt_fire_panel_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17b00b80-9167-45a9-9ca6-3addcd42cc86/zapobolavelitimumasazegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3b197fc-be64-4faa-a4ae-e89d267d7fa8/87063368471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0f940b7-e860-4620-aee7-570288494c28/duxejuxagiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6d323c7-5dba-477e-a50d-87b0e0dcc67a/vejevexenuvimidor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e82feab-c9fb-4fe4-a90c-1b942c1bd52f/wukuxomamexogevofepelod.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_off00006f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6F 5548 bytes
SHA-256: f4d4cc6a196d6e3f5470cfdad086413276cfb8f823c5175c39df0396126fa37c
font_01_sfnt_off00008230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8230 13536 bytes
SHA-256: 3630c0c2fe2897d2c1b097a1c50ded0a8a256b274617c7343f2af5b36f7cbb32

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