Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc1c748de0b6c96…

MALICIOUS

PDF

41.8 KB Created: 2020-10-25 23:19:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: c1b86091384bd0cc88b5cf61bdd7ad35 SHA-1: b935cc881cf36ebc967081a836ca0ee4a2714596 SHA-256: 9fc1c748de0b6c96481fca4f1414aae029c00b283c89f1ba0a577c92d43d92cc
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://ttraff.link/123?keyword=rd+sharma+class+10+book+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f8f6eb0d8207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5f8a4dba346d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f870bbc02871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_5f903fd7bccae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377642/normal_5f934fcfdfa67.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/bab8c3.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/c5a32c4a8a6540.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/mofep.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3355978.pdfIn PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/dokanaredaz.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/miwuxelo-kikukiroli-vitijataw.pdfIn PDF document text
    • https://vidojibirulon.weebly.com/uploads/1/3/1/0/131070792/be870852.pdfIn PDF document text
    • https://koworuvixoduto.weebly.com/uploads/1/3/4/3/134352933/lupawinemukizenubajo.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006610.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006610.bin)
    • https://s3.amazonaws.com/gupuso/91006218861.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/wamif.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/evolution_of_computer_programming_languages.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/accordi_chitarra_canzoni_italiane_facili.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/31868797421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/achieve3000_teacher_edition_answer_key_full.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4816/3738/files/94329084841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4170/4104/files/kinemaster_apk_download_for_laptop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5221/8541/files/41494936670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5289/9231/files/gefuziwuzunexonelagusob.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 extracted file (font_00_sfnt_off00006610.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6610 5800 bytes
SHA-256: 7d7ac8cc32a33f41a10bd1e018b105bcb1dd0f290f411cde574a42a85b50431f
font_01_sfnt_off000079a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A4 9548 bytes
SHA-256: 503ac8ca5e28dc7a1f08670cb707021b87e2bfd1d802df291c3a9044056d2d8c