Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9dba547820df8de…

MALICIOUS

PDF

43.3 KB Created: 2020-08-12 01:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: e4a40366653390f0abc1488ce84f8b6f SHA-1: b6375767370825df0af5d2fe77a75997e3dc83c0 SHA-256: a9dba547820df8de6627a28e160be6bbf37a8cf21ac0f50c266b6e3e98874390
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://ttraff.cc/pify?keyword=ansiedad+que+es+pdf In PDF document text
    • http://kufubi.joshuaewilliams.com/uploads/1/3/1/4/131437812/7497855.pdfIn PDF document text
    • http://files.bcotmaths.com/uploads/1/3/1/3/131398234/tuvugedi.pdfIn PDF document text
    • http://zimixi.mhschoirs.org/uploads/1/3/0/9/130969465/towejewezu.pdfIn PDF document text
    • http://files.heartandsoleintuitivehealing.com/uploads/1/3/0/7/130775108/bixigeruk_togegegosol_mapuna_sexufopaxovatex.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/1/0437/5012/9813/files/el_liberalismo_es_pecado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/tadolugenugegalumelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8168/5406/files/mesumodifinuropofegaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/5425089591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9342/5316/files/xekamuzojunapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9734/1604/files/lolerugewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6284/1759/files/infiniti_navigation_dvd_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4982/9023/files/xixibapugizivulutetomas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7837/6867/files/python_weather_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/19184755287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2812/7654/files/sosiguzologidenekumisedob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/xoxinepojutipuw.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 2

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_off00006b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B02 5024 bytes
SHA-256: c80a3495e27584f5bf6b8641a1535b105c7d74a54bf915652cce501ecf233868
font_01_sfnt_off00007c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C28 10868 bytes
SHA-256: 174accd3610599ecfc7092355aa972b569dfe5309c3cb78e757897750c5da2da

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