Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1a805aceee5f73…

MALICIOUS

PDF

43.0 KB Created: 2020-10-14 20:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3ffe353ef4fb84addc00a39b9dbc69d0 SHA-1: eaeb2d3945092356cdf04f0a782383960f507657 SHA-256: aa1a805aceee5f73177026212b6e7efb4256be7883be0f00d9a6ba39ae14128e
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://cctraff.ru/strik?keyword=record+video+android+screen+adb In PDF document text
    • https://site-1048488.mozfiles.com/files/1048488/jikininexivigesimulakavav.pdfIn PDF document text
    • https://site-1042551.mozfiles.com/files/1042551/79770719944.pdfIn PDF document text
    • https://site-1037237.mozfiles.com/files/1037237/fasujuzoxekobabebexe.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/sanufiruwula-nuxagadedanureg.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/9594994.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/gefudigoramoju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f872f5396aa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f8721f7ae6ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f870630cacf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f871605a76ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f86fa8733456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f8717fd93fa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f86f54d14ade.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/tidivobinimigip-banez-batipafon.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/3591910.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/1/0501/1682/1157/files/killing_mr_griffin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6701/4819/files/cigna_healthcare_provider_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/6429/6092/files/torch_browser_apk_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8188/4329/files/traditional_assessment_definition.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_off0000676a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x676A 5108 bytes
SHA-256: 47eb2346144ca63ab7e26ccb659579edf957a6568ee5054fc77835bba7d8ea38
font_01_sfnt_off000078db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78DB 11640 bytes
SHA-256: 747771c2016c2ff3ececba53fa640a74e7f4fbbfceb5bf19f46a2f789821b7fc

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