Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae684a5994d9afd3…

MALICIOUS

PDF

36.9 KB Created: 2020-10-04 23:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: dbf9270b10e96e5e3629d7f7935dfe8d SHA-1: 26b49e782936f69c2d79aea78d65c317321507c5 SHA-256: ae684a5994d9afd39ecba948053de8e16f09dc080f8fa70c9c7d606dd11180b0
132 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=financial+management+theory+and+practice+15th+edition+free+download In PDF document text
    • http://fages.lilianaduque.com/uploads/1/3/0/9/130969352/vavazuvapagov_sezezupa.pdfIn PDF document text
    • http://mufiw.littlechristianpreschool.org/uploads/1/3/1/4/131453060/16f26fc48.pdfIn PDF document text
    • http://files.newwestminsterchristadelphian.org/uploads/1/3/2/7/132740836/9b3acbd5743.pdfIn PDF document text
    • https://site-1036750.mozfiles.com/files/1036750/76390323775.pdfIn PDF document text
    • https://site-1037157.mozfiles.com/files/1037157/durofimekigaxukojod.pdfIn PDF document text
    • https://site-1042840.mozfiles.com/files/1042840/53313866091.pdfIn PDF document text
    • https://site-1037135.mozfiles.com/files/1037135/mokibe.pdfIn PDF document text
    • https://site-1038831.mozfiles.com/files/1038831/tokuga.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/1/0433/0523/8688/files/my_name_essay_conclusion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/biwesivuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1864/8732/files/still_hurting_easy_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4829/9417/files/letter_to_parents_from_teacher_distance_learning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1695/1704/files/virginia_beach_city_public_schools_job_fair.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_off00005149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5149 5716 bytes
SHA-256: 9078b76984c6a07ca064f766020c583ffbc33531cd141da9584520550cbbd07b
font_01_sfnt_off000064b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B4 9696 bytes
SHA-256: 59fcba6524d353e11b2992058157da219f9f23cac34334cc8518a11002b4c350