Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6c477e2e9d17699…

MALICIOUS

PDF

45.9 KB Created: 2020-10-16 06:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-02
MD5: 74762059033692a8552ebdfdf3699371 SHA-1: 454f1fc041bf2d5604368f323437212df15fbdfb SHA-256: a6c477e2e9d17699afad8ac0509ecb192bf364c10ba217c4026f3ad59dc3c096
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://ggtraff.ru/strik?keyword=540i+timing+chain+guide+replacement In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jasamejug-jenutuzudemeluf.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/739bdf.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/36ce75ac.pdfIn PDF document text
    • https://site-1040244.mozfiles.com/files/1040244/96054091450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f890d4352068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f88f8bfc9bf0.pdfIn PDF document text
    • https://site-1040288.mozfiles.com/files/1040288/68919549203.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/39249745269.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000075c6.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000075c6.bin)
    • https://cdn.shopify.com/s/files/1/0499/2191/7086/files/59837835845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/xunutavuvex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4500/2657/files/59774062668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9805/8141/files/greek_god_of_art_painting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2661/1357/files/mivivujonowinaxaravofaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8250/9213/files/bijeruvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2511/1967/files/14777568630.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 extracted file (font_00_sfnt_off000075c6.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C6 5568 bytes
SHA-256: f17df0f74a5ad3e6fb3424219ec3d215515208d687bf9e24c760c04af0022f85
font_01_sfnt_off0000887b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x887B 10044 bytes
SHA-256: 637b3d4c28729b9603b6648ac09ee8ae4d848fa13866357d7e3836da8d2525a8

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