Malicious PDF — malware analysis report

Static analysis result for SHA-256 6afa36cc7947cd28…

MALICIOUS

PDF

35.0 KB Created: 2020-10-07 15:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: a6b9f5e0a0e397459a2d9829494715dc SHA-1: 58065a21f8c0df6bedf8a4e5b76ea77e0f0dd231 SHA-256: 6afa36cc7947cd28fe605256b5ad9a5b62ab34e503df2f4e43bc4f1b80d86633
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=los+angeles+reddit+r4r In PDF document text
    • http://files.bearsmediacenter.com/uploads/1/3/1/4/131407405/tufuwijafotig_gazivilurozud.pdfIn PDF document text
    • http://vaditiso.languagelearningforchildren.com/uploads/1/3/1/1/131164250/detipenelupaz.pdfIn PDF document text
    • http://povip.kikiskreationsca.com/uploads/1/3/0/7/130776219/vipopef_wasazufibale.pdfIn PDF document text
    • http://dozuruguw.sheetmaskshop.com.au/uploads/1/3/1/4/131452743/buwiminusomepemadaf.pdfIn PDF document text
    • http://gipagal.lethbridgeelectrical.com/uploads/1/3/0/7/130776783/079b902.pdfIn PDF document text
    • http://faxexig.ironinktattoosmi.com/uploads/1/3/1/6/131606140/xusufexajawota.pdfIn PDF document text
    • http://xerona.sinkorswimapparel.com/uploads/1/3/0/7/130740437/7286206.pdfIn PDF document text
    • http://balitup.maacoweb.com/uploads/1/3/1/0/131070161/nulimopijuwaget-botufib.pdfIn PDF document text
    • http://zuwano.handwritingconsultants.com/uploads/1/3/1/3/131398440/famabe_fujewuxo_gefuwodaduribaf_xutab.pdfIn PDF document text
    • http://momubal.wastelessjewelryandcompany.com/uploads/1/3/2/6/132681947/778f1a4b6f556.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/1/0436/2600/4642/files/1000_paper_stars_comic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8359/4909/files/jezumipubogaposido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/27540849918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9348/6487/files/free_apex_coins.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_off00004cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB6 5020 bytes
SHA-256: d91f9e258f43b3b8db94e6984352eea0f40fb72f32dfaea30e07067af2dd7f72
font_01_sfnt_off00005ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDF 9892 bytes
SHA-256: 6921a688067a9cadfcbd2de9364f768c096ec01c682148c140c7eba7bf244297