Malicious PDF — malware analysis report

Static analysis result for SHA-256 b76576c212eb0b58…

MALICIOUS

PDF

42.7 KB Created: 2020-10-15 23:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 10e2bc1d6e9d1593a453927589a5ec9a SHA-1: 5d7d00c7f2bb71d9654300b4854b7b848684b7a5 SHA-256: b76576c212eb0b588c70fed04e34cbe5958d363ff0f21558d1f73e2445dbed10
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/123?keyword=descriptive+paragraph+writing+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f8854972d16a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5f87fb431aef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368237/normal_5f87a6c224c5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f8750cceda51.pdfIn PDF document text
    • https://dotofinadi.weebly.com/uploads/1/3/0/7/130740455/7811255.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/vudodapazepipux_kijemomebegax_velagokotukif.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/juxeza.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/tanig.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/1/0433/8515/9843/files/guitar_hero_ps2_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8135/4404/files/64570157583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0383/9140/files/engineering_physics_laser.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7868/0727/files/wegimibagajogepuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1275/8963/files/clarkston_high_school_football_coach.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9502/4025/files/ordering_fractions_worksheet_grade_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3734/0060/files/ford_escape_2020_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/0801/6551/files/kefululesovulefudakigorof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6875/1523/files/24640405297.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

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_off000068d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D6 5536 bytes
SHA-256: ab4d4632f64b82e07016ff437e539012b2ee229dc56c4e708699499bd36b84c1
font_01_sfnt_off00007bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBD 10016 bytes
SHA-256: 101efce895e115a3086c5a2176d5b4f575377e61d1019fa1d4f91c463b5f2191

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