Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7000bca209d9dce…

MALICIOUS

PDF

71.5 KB Created: 2020-10-16 04:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 51a45700b8f4f7fa124f0b22ef56401c SHA-1: 8027e2ce808a0d0197579ee06ca35bba858fee43 SHA-256: b7000bca209d9dceb0621061b1fcb27048087c96e61d668b263d61d6243a4997
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=deepwater+horizon+accident+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f875114416e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f8731fe4b124.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_5f88bcfad2b52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f88b549b287f.pdfIn PDF document text
    • https://punadojum.weebly.com/uploads/1/3/2/6/132680976/ce12f3ff.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/mezuber.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1cf22.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/8811960.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/1/0483/8939/0487/files/13314380107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1188/9573/files/85872336752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/0869/2892/files/vurixuzewejixobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5587/3699/files/melowisizufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3364/7509/files/merges_on_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5234/6777/files/jatisigovijasire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7662/6848/files/common_map_symbols_cub_scouts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0158/5562/files/kobo_aura_one_reading.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9816/8725/files/otis_spunkmeyer_cookie_ovens.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1597/6613/files/3930461075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2574/4540/files/maria_irene_fornes_fefu_and_her_friends.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5221/2130/files/woburn_high_school_athletics.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_off0000da42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA42 5172 bytes
SHA-256: b40c58f666299aeffa8a287c76a842b4e49d1ea01c25b028d43f8e78a5b4a31d
font_01_sfnt_off0000ebf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF5 10636 bytes
SHA-256: c61dcc3d01b0ce949e21265699a78e0b9165360419ae22306857184fdf3544a1

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