Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd70dd7244f4465…

MALICIOUS

PDF

41.9 KB Created: 2020-10-15 12:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: bc3d75d744521102bce92f5966e8effd SHA-1: 3fd0d274c12c18ab3e0d57393e8ec9b45c4b7a2b SHA-256: 7cd70dd7244f44657aa81bb4e6e58428fbdeb652fa65400b8beafe02cc2e0bfc
184 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to a known malicious redirector at 'https://cctraff.ru/strik?keyword=movietube+apk+4.2+download'. The document body and heuristics indicate a lure for downloading software, likely to facilitate further malicious activity. The ML classifier strongly supports the malicious nature of this PDF.

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://cctraff.ru/strik?keyword=movietube+apk+4.2+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5f87a9f3d959e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f870ac7c32ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f87085268f70.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/luvavedefafa.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/jenimifimawusu_lelujul_pomabuvelido_revogitux.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5648329.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/likanutavorolebonat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f8733649cb70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f8748699ef01.pdfIn PDF document text
    • https://site-1037235.mozfiles.com/files/1037235/kopuku.pdfIn PDF document text
    • https://site-1040576.mozfiles.com/files/1040576/39299927015.pdfIn PDF document text
    • https://site-1043545.mozfiles.com/files/1043545/zagazexupu.pdfIn PDF document text
    • https://site-1037219.mozfiles.com/files/1037219/5051363006.pdfIn PDF document text
    • https://site-1038413.mozfiles.com/files/1038413/89441846453.pdfIn PDF document text
    • https://kakawugob.weebly.com/uploads/1/3/0/9/130969990/lojovefukajevipi.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/vatozona.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/1/0432/9383/5432/files/50768243028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7891/9344/files/draft_ruu_kpk_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1480/6440/files/cisco_chapter_8_quiz_answers.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_off000065e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E9 5292 bytes
SHA-256: 2f00f4a023220546b1e71cd9a8d99cb50bf9b07438f48bbb212d8734236c9a60
font_01_sfnt_off0000782d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782D 10012 bytes
SHA-256: 943c27db592de930ece95389b7572f08a461eba3391393f8f0553aa89fe458d0

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