Malicious PDF — malware analysis report

Static analysis result for SHA-256 693cf7bde2780ce9…

MALICIOUS

PDF

43.8 KB Created: 2020-10-27 06:36:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 15a4464eaee8090a7093300be3ac220b SHA-1: 1db81cd3e791c1e73f3d0fb44565410d46e8b5d5 SHA-256: 693cf7bde2780ce97540e01858ad27548d2f221bb551ce89a119a104bdfd0f10
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many of which point to SEO-optimized PDF documents hosted on Shopify. One of these links, however, redirects to a known malicious domain, ttraff.ru. This suggests an attempt to use a link farm to obscure malicious activity and potentially lead users to harmful content.

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.ru/123?keyword=orca+bite+force+vs+great+white In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5f9783cc46a72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411246/normal_5f97930466c1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f94cd1087543.pdfIn PDF document text
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/minajadusokovanadara.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/2911433.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/gusuri.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/movew.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/1/0484/4234/3574/files/stanford_applicant_portal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5060/1110/files/101_algebra_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8771/9320/files/what_factors_influence_public_opinion_in_texas_quizlet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/9135/4534/files/stl_file_viewer_app_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7920/2469/files/que_pasara_con_huawei_y_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0902/2376/files/program_bmw_garage_door_opener_without_remote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/ionic_2_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/68542172011.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/zewasakinerasupugikara.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/sugeru.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/negotif.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_off00006cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC1 5432 bytes
SHA-256: 9d8bb9f4807659ae8ddecd875ec65d83b1bebe619ab96f7af69372ccaa9467b7
font_01_sfnt_off00007f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4A 10128 bytes
SHA-256: 38ef4fb293369a912e7ab5a95fe55e5420776a4895ee39830a2ac6ee68c0c48d

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