Malicious PDF — malware analysis report

Static analysis result for SHA-256 42074ae79abbcc6e…

MALICIOUS

PDF

41.5 KB Created: 2020-10-05 14:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fed9b8efcfed62c438c69bd55b0518b1 SHA-1: eb79f121967ed3ca255167659d212d67be82aec2 SHA-256: 42074ae79abbcc6e5e886779f80bcbcd2977861971bf7d2e84bfa39f48990692
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/pify?keyword=tracy+chapman+give+me+one+reason+live In PDF document text
    • https://site-1038583.mozfiles.com/files/1038583/gujulitojisawepazuzazit.pdfIn PDF document text
    • https://site-1037094.mozfiles.com/files/1037094/purapudivu.pdfIn PDF document text
    • http://nanoda.orangeabc.com/uploads/1/3/2/7/132740780/vuzez_loxejobitupuwu_mafixumovibu.pdfIn PDF document text
    • http://files.valancourtbooks.com/uploads/1/3/0/7/130739298/8339197.pdfIn PDF document text
    • http://files.sscyrilandmethod.org/uploads/1/3/1/6/131607010/garusove.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://cdn.shopify.com/s/files/1/0483/2536/1817/files/borderlands_2_neogenator_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7100/7637/files/guletopizogimabigovili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2894/5819/files/47991977629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7078/2624/files/24543113989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4260/5736/files/ragnarok_m_cooking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3457/3991/files/zozisuralomenavebogi.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_off000056ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56EF 5168 bytes
SHA-256: 0ff046d338e2a9b559f77e726f67f763b8b400c8108fb490a7d5ed0794976cb3
font_01_sfnt_off00006857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6857 10148 bytes
SHA-256: 3ec50fe30fce75018e573c0abea441b8429ccc4a4c6b4877bc0e7c398b866327
font_02_sfnt_off00008b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3