Malicious PDF — malware analysis report

Static analysis result for SHA-256 909aad6768ff130e…

MALICIOUS

PDF

42.8 KB Created: 2020-10-02 13:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d08bf2e15ff4c37bb779d69700ce4f2a SHA-1: 4096b8eca86611445c54b055f9d4f302f61c492e SHA-256: 909aad6768ff130e0ce5805e3ca70f6c47428e0d780239bb896d4ea595fd03d7
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/strik?keyword=excel+vba+for+dummies In PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/vumarisi.pdfIn PDF document text
    • https://site-1041695.mozfiles.com/files/1041695/nezowelogazadubolaw.pdfIn PDF document text
    • https://site-1038413.mozfiles.com/files/1038413/86166926347.pdfIn PDF document text
    • https://site-1040006.mozfiles.com/files/1040006/fepegosinujiji.pdfIn PDF document text
    • https://site-1036971.mozfiles.com/files/1036971/wiwibe.pdfIn PDF document text
    • http://xulanexeg.firehawkllc.com/uploads/1/3/2/7/132740209/gakem_zazife_lididonen_fewisezufoxut.pdfIn PDF document text
    • http://files.sdconference.org/uploads/1/3/0/8/130873941/007de3cd7adec3d.pdfIn PDF document text
    • https://site-1040512.mozfiles.com/files/1040512/11885036732.pdfIn PDF document text
    • https://site-1039414.mozfiles.com/files/1039414/76952281302.pdfIn PDF document text
    • https://site-1039285.mozfiles.com/files/1039285/vifibuduzasi.pdfIn PDF document text
    • https://site-1036811.mozfiles.com/files/1036811/73161420702.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/1/0501/1770/5893/files/taurus_man_sextrology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5234/6777/files/the_elements_scavanger_hunt_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3545/8198/files/22562195333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/88568749021.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_off00006a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A60 5392 bytes
SHA-256: 2d108b04daf374049bb792ae37dbc0b593e0530f4c54e075b1b24a64288b1afc
font_01_sfnt_off00007cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAD 9872 bytes
SHA-256: 95c1e137546dd300f94a09d4836769de28bddbfd676904689ec4f6705baf1d24