Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7dca4a0268e9ad…

MALICIOUS

PDF

41.5 KB Created: 2020-10-03 03:40:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 55ed78645f80f319620d671d0f7385af SHA-1: 615da3f417818eea1d16fb0c616fcc5984dd4ce1 SHA-256: 6e7dca4a0268e9ada1517f4544f71ed70ea0933bbed2aef4069fa96d05b3d0b7
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=the+dark+knight+screenplay In PDF document text
    • https://site-1037120.mozfiles.com/files/1037120/69060851225.pdfIn PDF document text
    • https://site-1038413.mozfiles.com/files/1038413/97948423151.pdfIn PDF document text
    • https://site-1036823.mozfiles.com/files/1036823/dejulazabegufupuboxajunu.pdfIn PDF document text
    • https://site-1040101.mozfiles.com/files/1040101/suluzegesalo.pdfIn PDF document text
    • https://site-1040299.mozfiles.com/files/1040299/80496741341.pdfIn PDF document text
    • http://sitemad.izakaya-sasaya.com/uploads/1/3/0/7/130738623/siwom.pdfIn PDF document text
    • http://zafepaw.nightwispdesigns.com/uploads/1/3/1/4/131406736/6263370.pdfIn PDF document text
    • http://defim.jaclynfishlerportfolio.com/uploads/1/3/1/8/131856772/lelepogumobagakuj.pdfIn PDF document text
    • http://mekazosod.adirondacklabradoodles.com/uploads/1/3/0/7/130775389/raxos.pdfIn PDF document text
    • http://files.gailwisdom.com/uploads/1/3/1/3/131380892/kixusobedu.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/1/0440/6181/9045/files/pdf_focus_on_ielts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3528/6943/files/23395330387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3293/2252/files/geometric_sequences_worksheet_algebra_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9520/3745/files/tirotiruwegopasal.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_off000062ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EA 5448 bytes
SHA-256: 4ff9ad2d365ae11f485b3442b87c928ff1ceeecd2c718770ce0a0b2b1243ef55
font_01_sfnt_off00007579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7579 10640 bytes
SHA-256: ea5282dd1423519d38a086a143ba510761bb67e366d816b8ee26acb61bffb56c