Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3a4eed90c0277f…

MALICIOUS

PDF

52.0 KB Created: 2020-10-09 02:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: df3083c539b3ee6337193dc09c969db9 SHA-1: b46e0b9fa5fb3f51b56b72a0366125cbf9446699 SHA-256: ae3a4eed90c0277f8afbe189d8b7fb82a06ae0b1a67ab6857deda82a666e0572
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=catnapper+lift+chair+owner%2527+s+manual In PDF document text
    • http://kawufuw.stephaniemjorandby.com/uploads/1/3/0/9/130969895/d31c7ce4.pdfIn PDF document text
    • http://files.statebirdtogo.com/uploads/1/3/2/7/132710687/a1b067.pdfIn PDF document text
    • http://sizudo.beaumonttennisacademy.com/uploads/1/3/1/4/131407406/koruguvi.pdfIn PDF document text
    • https://site-1039478.mozfiles.com/files/1039478/lexipaguxis.pdfIn PDF document text
    • https://site-1037273.mozfiles.com/files/1037273/48627724099.pdfIn PDF document text
    • https://site-1037202.mozfiles.com/files/1037202/83980299015.pdfIn PDF document text
    • https://site-1038599.mozfiles.com/files/1038599/pikesanigebajorameza.pdfIn PDF document text
    • https://site-1042684.mozfiles.com/files/1042684/kizoguwuzudijapizosuvu.pdfIn PDF document text
    • https://site-1040104.mozfiles.com/files/1040104/90317135572.pdfIn PDF document text
    • https://site-1039360.mozfiles.com/files/1039360/nusimo.pdfIn PDF document text
    • https://site-1037230.mozfiles.com/files/1037230/63381508497.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/1/0482/8777/6932/files/688_credit_score_good.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9690/3331/files/how_to_find_threshold_frequency_from_work_function.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7527/2855/files/ecuaciones_logaritmicas_calculadora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8309/4952/files/84203778625.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a0f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA0F4 19564 bytes
SHA-256: 39bca436010d74d0780c22dc0ce819ff2e369cf00ddb63a186afa1a0cd4e8cc1
font_00_sfnt_off000065e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E5 5288 bytes
SHA-256: cc44a578eb2fa51e9d390e848c0e9d6fb36f08fb934fd572a2b92aec7d417b60
font_01_sfnt_off000077d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D2 12672 bytes
SHA-256: 46cb574abd0a4b4b8f84325bc1c1bad496ba3068a2106511fa131f34870c726a

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