Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb02e41ac4a136ed…

MALICIOUS

PDF

54.2 KB Created: 2020-11-05 15:54:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 3136e2ffbbba15f1fa1ac4dfe00480a6 SHA-1: 3455836ac4332049938aa021396ca882113d55b1 SHA-256: bb02e41ac4a136edf505cde7215e75275912a663caba2b2971570ab670c3f78c
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://traffmen.ru/aws?keyword=aimee+yancey+feet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f87022f1bbc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375339/normal_5f8f5ea96b140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384295/normal_5f99999911f3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_5f984a3f38472.pdfIn PDF document text
    • https://rimosuvifakub.weebly.com/uploads/1/3/4/3/134310068/bolebuziresexi.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/68318e53a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/microsoft_access_case_statement_syntax.pdfIn PDF document text
    • https://s3.amazonaws.com/betimugi/83149987164.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/prayers_and_proclamations_derek_prince.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/captain_america_cosplay_helmet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6276/7015/files/civil_engineering_basic_concepts.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000088b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B4 4492 bytes
SHA-256: 14227d6c4800d719d260b25616534d6504a468e0e9fb1b91cbc34d641baab60c
font_01_sfnt_off000097d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97D9 11164 bytes
SHA-256: b3cf4a5d1c060e4827d5ef344200eb46c478da3f682e60f7fa4b9b234dfd5793
font_02_sfnt_off0000be2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE2C 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71