Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc6fa66c8f4f1d9…

MALICIOUS

PDF

36.2 KB Created: 2020-10-06 09:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: dc202c534830d725145783fe6794d91a SHA-1: f83c6534685a5b022373778db5a3584ac6849a48 SHA-256: 6cc6fa66c8f4f1d9caf79f4d861bc947c71f3f5e1dd44200074c055037ec9259
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pally+power+3.+3.+5 In PDF document text
    • http://tidel.wildphotos.org/uploads/1/3/1/3/131383726/gewowibilajewod_legaj.pdfIn PDF document text
    • http://files.sommerranchbordercollies.com/uploads/1/3/1/8/131857758/8282465.pdfIn PDF document text
    • http://zexupav.physiciansprimarycare.org/uploads/1/3/2/8/132816117/xujewizif.pdfIn PDF document text
    • http://xurel.occseagles.org/uploads/1/3/1/4/131406286/komemejo-zipive-sojoxexop.pdfIn PDF document text
    • http://files.majesticgalaevents.com/uploads/1/3/1/3/131379037/xufojudu-senizebezijuz.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/1/0480/8245/2643/files/kingdom_hearts_3_treasure_chest_locations_arendelle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3014/5942/files/westin_heavenly_mattress_california_king.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7397/9043/files/nivajozefezipujukupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9074/2947/files/netow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9127/0563/files/pathfinder_deific_obedience_erastil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6510/6847/files/how_do_i_live_lyrics_by_trisha_yearwood.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/4311/0302/files/museminores.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3882/1530/files/deer_run_school_east_haven_ct_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2199/2599/files/grupo_laberinto_corridos_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a791bc62-c89b-4d2a-afc4-d59315c9e20f/21104902764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/362c19c4-8f56-47ed-9aaf-0d264313bbc2/bopexupig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f659ed-48b5-45e1-9271-f47afb5521f3/joxunajiripedesofavavetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10bce8a2-ed53-4dfc-83b5-bf4dc95837c3/kofuvulatataladizozos.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_off0000509d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x509D 5148 bytes
SHA-256: 3fc4202ddb17a3d87c1492d1aa9e8b0a1cc0eef219ec4109ed4852321de56223
font_01_sfnt_off00006251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6251 9848 bytes
SHA-256: dd6b8cbf3cb6f03a1e1372ba59e43d6c5c3653c577f93708aed664f2f0dafdb3