Malicious PDF — malware analysis report

Static analysis result for SHA-256 b27de150a3cd98c2…

MALICIOUS

PDF

35.9 KB Created: 2020-10-31 12:00:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: ea8d4cfc5a7aabc362f568566d15ab67 SHA-1: 49d5d64c0a65b987705dea44721a25c40c611889 SHA-256: b27de150a3cd98c2c762fd36bc2187d0a73ab9b0c41842c33230749f03161563
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.me/pify?keyword=playhome+character+cards+download In PDF document text
    • https://nimubawelekuf.weebly.com/uploads/1/3/4/2/134265751/budup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385424/normal_5f8d2e12622f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377400/normal_5f9c471483e0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5f9332c8cc6c9.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/rimotipa.pdfIn PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/947fd8d2109.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/703da95c-ab48-4624-a209-47e89e600642/59635638731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e32e2f18-7e1a-4358-b373-9d1771cb1582/bedava_mzik_indir_dur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8315/2542/files/juguvorisigomukolivitud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b156dc-bd2d-479d-8cdd-e9bbfb051d64/zifalavuzibeposepisukitum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/5437/2259/files/92611368417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3468ec38-5086-41cd-970d-0ad158b16537/harry_potter_chess_set_target.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_off00004bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BBC 5376 bytes
SHA-256: a90fad24392ff25f4c44f3d5c71cf872e44e82eca19e2509f59ec9172cf9dc68
font_01_sfnt_off00005de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE9 12000 bytes
SHA-256: ec7b4262d3a36b3136e695a7a0dfbc4fd746bd89b9ba3382bc5e144ef32a1c1d