Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb2744204f5f496…

MALICIOUS

PDF

51.6 KB Created: 2020-11-07 02:42:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: da1bbfda02b6fe4dad780d56e6ad93f6 SHA-1: 8b2eb68af588b125273f0cf0ddd636f94fd1fcff SHA-256: bbb2744204f5f4960dbc7756a48dd3462313ea28e6397cf0d753bb648e856f82
184 Risk Score

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://traffking.ru/aws?keyword=disney+world+logopedia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414491/normal_5fa259b0856e8.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/56c3a7aab.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/wivovud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383467/normal_5f9943caf2edc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475559/normal_5fa5103f86999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_5f91d70870f34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421611/normal_5fa42aabce75a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://dowuwonapute.files.wordpress.com/2020/11/maternity_leave_application_form_for_teachers.pdfIn PDF document text
    • https://kozedin.files.wordpress.com/2020/11/turbo_charged_prelude_full_movie_dow.pdfIn PDF document text
    • https://tumitom.files.wordpress.com/2020/11/wazupalapiriwiji.pdfIn PDF document text
    • https://lugukanit.files.wordpress.com/2020/11/rizupuduvebiko.pdfIn PDF document text
    • https://gufanusotin.files.wordpress.com/2020/11/bbbp_application_form.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_off00007b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B04 5028 bytes
SHA-256: 8e50cd76be41808417e320c4fdf850e0240e1930d25341de43d0cc8e5108ae53
font_01_sfnt_off00008c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C35 12432 bytes
SHA-256: 9ab0719eb9ec56e55f37bc52eb0fafe659ea26fa1b779447182cd9daa6640ebb
font_02_sfnt_off0000b3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f