Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ccdbf7ebee05add…

MALICIOUS

PDF

50.9 KB Created: 2020-10-12 11:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 383a946ac7be57b78a2c6d486fa24185 SHA-1: 07c6797846cd73ec5f797b5b58204058bc725218 SHA-256: 0ccdbf7ebee05addf925a2359eb6baf709cf4e6d2b36033eef65590ab009ce67
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=freelance+graphic+design+contract+pdf In PDF document text
    • http://files.larsenbackline.com/uploads/1/3/1/0/131070212/6551147.pdfIn PDF document text
    • http://files.mike-rents.com/uploads/1/3/1/4/131454215/pajobub.pdfIn PDF document text
    • https://site-1037125.mozfiles.com/files/1037125/zofalavafonu.pdfIn PDF document text
    • https://site-1037897.mozfiles.com/files/1037897/46102427530.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/1/0483/6940/2009/files/30723894392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1015/7475/files/white_sox_stadium_seating_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2409/1802/files/66158795462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a620be4-5e65-4c72-9afa-eaf9180d5de3/10427026117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ff794e7-dbc4-4c65-a94f-8e2e017a8343/xametalilekam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58ef4a8d-7df2-4c1b-b249-74ea5a8d1396/jupelitijuremivizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/624874e1-9053-4f74-8be5-c2494f5430aa/gemepoginulowav.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_off000089db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89DB 5372 bytes
SHA-256: 1ef069cea67c798471be51bcdb50107b0a29e4d6e38083bc4e70b1542c8f0a0e
font_01_sfnt_off00009c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C15 10240 bytes
SHA-256: 139576da78319d3239ec13e5df455e16e44eddc66061a7bafd55339f7c5f515f