Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf2df70c6490213…

MALICIOUS

PDF

51.5 KB Created: 2020-10-14 22:39:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 854f94ffc0880e13cb414af1cef9a68a SHA-1: 242f07330c72718aae896cecd2bd70184728fcff SHA-256: caf2df70c64902135b3619d49fa7b5bc50f5e4ac33ee146606eb45d954192e75
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/pify?keyword=google+contacts+android+4.4.4 In PDF document text
    • https://site-1042768.mozfiles.com/files/1042768/15929329430.pdfIn PDF document text
    • https://site-1037276.mozfiles.com/files/1037276/mipapesidavu.pdfIn PDF document text
    • https://site-1040251.mozfiles.com/files/1040251/80765993444.pdfIn PDF document text
    • https://site-1044186.mozfiles.com/files/1044186/xozolunalakavepuli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f87523f91a90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f86fe80d29a4.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/tipix.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/7971455.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/lozasuwexekizis-wewozugegi-doriruruze-fagowawe.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/a7b88.pdfIn PDF document text
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/parodaz_fokuxod.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/kurufe_devomikata.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/zipape.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/bf4458.pdfIn PDF document text
    • https://site-1040099.mozfiles.com/files/1040099/disatujovopezaronewuzeku.pdfIn PDF document text
    • https://site-1042765.mozfiles.com/files/1042765/12934367145.pdfIn PDF document text
    • https://site-1036735.mozfiles.com/files/1036735/jakodativoge.pdfIn PDF document text
    • https://site-1038660.mozfiles.com/files/1038660/63058890831.pdfIn PDF document text
    • https://site-1042625.mozfiles.com/files/1042625/jezor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f873e679c4ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367644/normal_5f8749958816c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f8734197aa19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f871ff4c86c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00008067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8067 5256 bytes
SHA-256: cc7157c8c6369671d22cdcb91db3ac153c3b400927b1353ad9e2f1e9eae3052f
font_01_sfnt_off0000925a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x925A 1820 bytes
SHA-256: 32c9735be5e9b7b13cbe74779b6ea8ad6216d713a4d7d56ecf1e0de8bf6a962e
font_02_sfnt_off00009b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B0E 10836 bytes
SHA-256: 4d06c33f40b8012e6d7842ac285bbcc49ac198e4aca44bbf14870d0d74b58994