Malicious PDF — malware analysis report

Static analysis result for SHA-256 35fd57ca72b210c3…

MALICIOUS

PDF

36.2 KB Created: 2020-10-23 18:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 171e24b5b1b59091c05dc499d393240d SHA-1: e900e932568ff0b3a63fd9c0f5bbbac9b9ad351a SHA-256: 35fd57ca72b210c3df1923598c6fb2bcfcc765d78ad5d52faefb797cd22307e8
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://gettraff.ru/strik?keyword=outlander+2008+full+movie+in+tamil+dubbed In PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5f9211e53156d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375514/normal_5f89d109a2b97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f873e536a9b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_5f8d49d50ccce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370264/normal_5f8e5c78cd7e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389794/normal_5f9251517650b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/85503766837.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/lsat_scantron_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/fur_elise_piano_sheet_music_original.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/26472833106.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/ireland_tourist_map.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/71456719625.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/drawing_human_anatomy_book.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/flower_of_scotland_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/sunisudadonudubexew.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/jamuxekenizoregopogim.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/50670851169.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_off00004bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BCE 5568 bytes
SHA-256: a5f87c26eda39f6d4b117181b6a6c528cf469c251ec6c52fc2ea7b7ca77a2e02
font_01_sfnt_off00005ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA5 10356 bytes
SHA-256: f5b7b1db1a83d214d8d0eab9839e48454e97c594aa351a7ed91e6fbca4e96d2e