Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac08014a72073dda…

MALICIOUS

PDF

51.1 KB Created: 2020-10-27 08:43:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 68df1a5c69f598e1592184ddf7b8930b SHA-1: d857488e57aa5f8fba1285bfd04b81cbb992eed6 SHA-256: ac08014a72073dda41444e8e7955a428e269531aa2edd4d12835de10d371e219
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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=manual+x32+producer In PDF document text
    • https://fijefozumomaba.weebly.com/uploads/1/3/4/4/134491855/wogebadevuluni.pdfIn PDF document text
    • https://rowofijiguni.weebly.com/uploads/1/3/4/4/134479741/tomifinupalisetukisi.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/wufawijawudu_bupedala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388050/normal_5f912139b9a63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f89eee284f4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5f93b8d650d18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f8de4b38aee6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5f964b144cd2a.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/dcfa4214ba8d2d9.pdfIn PDF document text
    • https://zavomafig.weebly.com/uploads/1/3/4/3/134356936/gowexuwobuwivi.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/5e20c36439039.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/1/0486/4458/7688/files/51743676478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9074/8595/files/manual_handling_equipment_australia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6743/1329/files/interpreting_the_remainders_word_problems_4th_grade_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7530/4094/files/saeco_incanto_manual_de_utilizare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8709de85-8de7-4288-90f6-2eb7bc626627/73239150646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c8b3dde-3dc4-423d-b79e-7bae68cb6abc/68060052025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86eea71e-5c71-42a2-8b26-58703d275a1f/the_great_gatsby_vocabulary_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c43f90db-f313-4d6a-a41e-af149fbf486e/51226335611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbac7d2-b4ce-4556-ba19-faf02e9d00d9/daily_writing_journal_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac36daec-c3b8-4915-b28f-3376965b7c7d/29401245672.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D32 5256 bytes
SHA-256: 9abc180323e3056b256a7500a4fb7731a3e5de0414a96aa4644d866e7de1f0eb
font_01_sfnt_off00008f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1D 2940 bytes
SHA-256: 59a364ad371c5c8786e4dd51a1898c131c033c57f6517ca8de8ff0fb18f65f48
font_02_sfnt_off00009b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B77 10580 bytes
SHA-256: 74424a454f27e42abd18b15080397fce9a4633c9f40b1d48dcbd569e3cdcf2f7