Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cceec4815ab7e13…

MALICIOUS

PDF

41.4 KB Created: 2020-08-25 15:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bf154323b5a20a8ec4f527a3c4caff09 SHA-1: b2534347d892aa6c843ba10b9d91d63c7864d83b SHA-256: 4cceec4815ab7e13789932fe75aab1405a89985118c9edccbbb291198ec4a7c6
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.com/pify?keyword=critical+path+method+calculation+pdf In PDF document text
    • http://files.gerrystewart.com/uploads/1/3/0/7/130739351/taranomope.pdfIn PDF document text
    • http://files.westernlogcreations.com/uploads/1/3/2/3/132303083/nigodujirusibunasiju.pdfIn PDF document text
    • http://files.scituatefarmersmarket.com/uploads/1/3/0/9/130969297/jawasogi_mabaloniboro.pdfIn PDF document text
    • http://files.edsworldwide.org/uploads/1/3/2/7/132740320/sotilemiz-gukixedesimujar-bevulas-lativeponeji.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/1/0433/7002/1014/files/kufituxiseletobis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0688/5020/files/98640282259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6021/3398/files/detailed_lesson_plan_in_english_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6160/6550/files/affairscloud_current_affairs_weekly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4293/8784/files/dewifazigolunukawamamok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5838/0450/files/gopovekoxutekifoxefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6117/4684/files/mibomugijokuvit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/43409097164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/85123659123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0278/1083/files/mefigurap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9152/6559/files/jumafarufakuwodazabat.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_off00006529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6529 5124 bytes
SHA-256: 11bb8967205cf88b2bb8367e5880c42f630f8b68c5a9454f1aac85307044d97e
font_01_sfnt_off00007667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7667 10064 bytes
SHA-256: 88e5ac02b86357647bb5e0ec72f7a21be2813641d148370504e471f19106c521

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