Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa24a4c01a0c7b7…

MALICIOUS

PDF

48.0 KB Created: 2020-10-03 13:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ad601e4f68b2b2f633e025b948d298fb SHA-1: 212fc41fd461d530eefd1079b1bfbe5c2fa7001c SHA-256: 3aa24a4c01a0c7b7beb1706876b52ba652fb125c73495cf15c3a0c225c4d275a
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=fundamentals+of+structural+analysis+pdf In PDF document text
    • http://files.suzonspice.com/uploads/1/3/2/7/132710784/mezapibazogir_mabosem_jipadipibos_venud.pdfIn PDF document text
    • http://files.spiritearthreiki.com/uploads/1/3/1/4/131410939/roneremigexe_zoxiwafixemowe_juvewut_xazivurojime.pdfIn PDF document text
    • http://files.choyhope.ca/uploads/1/3/0/8/130813448/4301197.pdfIn PDF document text
    • http://files.drtiffanyanneyamamoto.com/uploads/1/3/2/7/132740905/vaxebagovevomik-xuniz.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/1/0433/2093/4558/files/17224362373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5573/7753/files/61706756024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1812/0099/files/how_many_water_bottles_a_day_is_a_gallon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/vipowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/para_que_es_zurvita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/562e082b-df04-42ad-a2a1-f3245f12dd13/mibavumurex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a4e9a51-c882-4063-9ba1-89451a2326c6/tewukemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16ad8919-4823-4f29-9d75-a92452b9c0a8/76347643104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d63f9e6b-fa0b-418f-b31c-6cc0a08fa576/bojivokele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a93840f1-d408-4ef6-97c5-d3814cafd993/zezumafasepebowef.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_off0000709a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x709A 5240 bytes
SHA-256: ffed04a43c609b1e1c9776bff787112c2f4d5c726cf863c91968fa115e33bf35
font_01_sfnt_off00008258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8258 10004 bytes
SHA-256: 3cfdd4db82b778bdee36507c7e698ef381ff99b6c61462499c7379c4e157373b
font_02_sfnt_off0000a478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA478 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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