Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86271ff68175f19…

MALICIOUS

PDF

52.1 KB Created: 2020-10-31 06:03:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 1e1ac92a8525d0fea7ef3e2997075eec SHA-1: 94a8fb4fb70556a39bff22bd5430606dcf0d9452 SHA-256: d86271ff68175f1903575b6673a0d21a036970bfda351b9151e1f48efa4b7f9b
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.cc/123?keyword=greece+world+map+google In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411932/normal_5f95322ac0cee.pdfIn PDF document text
    • https://pafetuvuwube.weebly.com/uploads/1/3/4/3/134321561/batadadoxogif.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/13eab.pdfIn PDF document text
    • https://senapuvuv.weebly.com/uploads/1/3/4/4/134459053/3879348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379606/normal_5f925f89efba9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389084/normal_5f935992bb9b2.pdfIn PDF document text
    • https://soremezu.weebly.com/uploads/1/3/1/0/131070226/wakupejurumu.pdfIn PDF document text
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/vawolix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f8c90e322fe6.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/1/0428/5952/8355/files/super_backup_app_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1656/6964/files/witchwood_dungeon_run_guide_toki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2655/4781/files/commas_semicolons_and_colons_worksheet.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_off00008e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E2C 5336 bytes
SHA-256: 698fb5119e552735c57c9302f50ad0d4cff5753bfec1cd7a24a89c0d0a396701
font_01_sfnt_off0000a054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA054 10432 bytes
SHA-256: 72fb4e7597c32c2564d9934a5b98b2bca3367a879d12db4246d030e3a2bdbeb3