Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05de599a8afeeec…

MALICIOUS

PDF

41.8 KB Created: 2020-10-07 12:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 181dd2ad5832d6f084316bc0b08769cd SHA-1: b3fa15599936c4942ab440ba3fa567ffb28d4e02 SHA-256: b05de599a8afeeecb65e58aa0ebc4a2f5aa4c44151f5ee88ad14d31d22fd78cd
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://ttraff.com/pify?keyword=nolin+lake+ky+county In PDF document text
    • https://site-1039570.mozfiles.com/files/1039570/21810818433.pdfIn PDF document text
    • https://site-1040609.mozfiles.com/files/1040609/kisobotibajifegamenad.pdfIn PDF document text
    • https://site-1037192.mozfiles.com/files/1037192/tizif.pdfIn PDF document text
    • https://site-1040080.mozfiles.com/files/1040080/18598327923.pdfIn PDF document text
    • https://site-1037230.mozfiles.com/files/1037230/35226914938.pdfIn PDF document text
    • http://files.muscatdogadoption.com/uploads/1/3/1/4/131438693/9935887.pdfIn PDF document text
    • http://files.rollthai.com/uploads/1/3/0/7/130739525/9298764.pdfIn PDF document text
    • http://files.bonniejanedesign.com/uploads/1/3/0/8/130874284/4374740.pdfIn PDF document text
    • http://files.farmtovape.co.uk/uploads/1/3/1/6/131607023/443f993c42.pdfIn PDF document text
    • https://site-1036818.mozfiles.com/files/1036818/jaxuxusamapasifokivojule.pdfIn PDF document text
    • https://site-1037145.mozfiles.com/files/1037145/moxobiwinakegokeg.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/1/0484/0121/9752/files/tifumodor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7015/9016/files/remivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0455/7472/files/xenupobetimaxukedef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/3084/7128/files/jandy_pool_heater_check_flow_set.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_off00006842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6842 4652 bytes
SHA-256: 196ae5a5a97e2cd9b10632c5040330cde3fb9ce457815f6b4b55fda59e781a8c
font_01_sfnt_off0000783d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x783D 10088 bytes
SHA-256: b5f8bd854e6d8ede77e5151d8a29e38337c9c714ca5ab48ce4f16bc7cdb14af7

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