Malicious PDF — malware analysis report

Static analysis result for SHA-256 acf772e81781ff03…

MALICIOUS

PDF

63.1 KB Created: 2020-10-14 19:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 61149aab6eb503868ca8c84e0b168214 SHA-1: c413b437cd8993c755dad8504c53caa26d96007e SHA-256: acf772e81781ff03c6fc43fa9238336b9907c836130f669dd02cb1f788aa8546
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://gettraff.ru/strik?keyword=zenonia+4+ranger+build+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f872264d100a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f8711d08b8ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8713cd5ba3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f87045fbfbde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f870dd8bc0b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f87183b2e9c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f87030955d1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f87007b1f1d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f8718d6b4e2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f8705774e0fb.pdfIn PDF document text
    • https://site-1040282.mozfiles.com/files/1040282/bafifiseredizemufoposebo.pdfIn PDF document text
    • https://site-1038789.mozfiles.com/files/1038789/85459702689.pdfIn PDF document text
    • https://site-1037835.mozfiles.com/files/1037835/rivajevisopidaxidifuvamig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f87107ac5a63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f86f5d44e08e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f86f58d3b3c8.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/1/0494/1987/8567/files/tanurir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7811/8304/files/jabagaxosed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8253/0472/files/civ_6_nubia_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0429/2004/files/samebiwawetamafep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9815/8744/files/the_greedy_cave_mod_apk_2.2.6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2048/3232/files/gadajok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/dodujivexekixil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3293/2252/files/xojufulixevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/5470/3004/files/advanced_mechanics_of_materials_boresi_6th_edition_solutions_manual.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_off0000b782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB782 5000 bytes
SHA-256: 25583e0134a109d71a3e574c9a0ac08a59cd533f66ac2521c6c516f6bf2e7d54
font_01_sfnt_off0000c88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88F 11220 bytes
SHA-256: 23cc14c17726d4375cc102fb26c9e967644c0679aca2cd1975507d1beb1f7f78

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