Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad755eecc6b3736…

MALICIOUS

PDF

41.2 KB Created: 2020-10-07 16:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8d4d5b9ace8881d429bb01ef13fa29e6 SHA-1: 0e1f079001f5332fc57e16974af4f4c9718361b2 SHA-256: 7ad755eecc6b3736b0b065a19d2ccc72e67e50536cd5c8caae1cba1d5ea5f40f
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://cctraff.ru/pify?keyword=no+rest+for+the+wicked+descendants In PDF document text
    • https://site-1036671.mozfiles.com/files/1036671/87677206297.pdfIn PDF document text
    • https://site-1039749.mozfiles.com/files/1039749/65960584779.pdfIn PDF document text
    • https://site-1038944.mozfiles.com/files/1038944/66905661400.pdfIn PDF document text
    • https://site-1043910.mozfiles.com/files/1043910/58701816435.pdfIn PDF document text
    • https://site-1042917.mozfiles.com/files/1042917/57872469277.pdfIn PDF document text
    • http://files.fridaytrampoline.com/uploads/1/3/1/4/131407227/lofekusebos.pdfIn PDF document text
    • http://jewezagi.windmillpreschoolbrill.com/uploads/1/3/1/6/131606183/buxov.pdfIn PDF document text
    • http://naritu.real-allure.com/uploads/1/3/1/6/131606268/zufifo.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/1/0429/5580/0739/files/59632614573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/dizepifepisuwolelokus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/78201844729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4369/1413/files/tabela_de_rosca_polegada_whitworth.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_off00006401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6401 5200 bytes
SHA-256: 909775b1f83ee2513fd98eeca724019038e56fa54a7fae1d3e756121b540ca5f
font_01_sfnt_off000075c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C5 9892 bytes
SHA-256: 797698f524e2265833441c3c0635eec04d30dc04b1f8072ec2201b77448abf21