Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba23e87d0940db5…

MALICIOUS

PDF

34.0 KB Created: 2020-08-22 14:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 12ff7041e4a73069d845d6fe9aa671a0 SHA-1: 08aff8d98462829749417ed339e6ed7e3e78bca2 SHA-256: 4ba23e87d0940db5e042dd5a588c50264ed57a717ec2a447f15e2759df57cb04
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to lure users to malicious sites.

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.ru/pify?keyword=avision+av176u+pdf In PDF document text
    • http://files.memorialcityhall.com/uploads/1/3/2/7/132741385/jevedafufew-badazap.pdfIn PDF document text
    • http://lamixa.nicolewilliamswrites.com/uploads/1/3/2/6/132682646/6559474.pdfIn PDF document text
    • http://files.onethreeproductions.com/uploads/1/3/2/8/132814261/punesagamuto_zijenolegid_federa_nejudotizoda.pdfIn PDF document text
    • http://siviku.vgctrading.net/uploads/1/3/0/8/130874330/rolunuvaxitogo.pdfIn PDF document text
    • http://files.buffalocommonspress.com/uploads/1/3/1/4/131407214/9728085.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/1/0432/7607/5164/files/bet_angel_user_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2290/7554/files/bojunuxasubokotipapuzem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/pubuzewidesebujokonebir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/muritosuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/2104052433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9304/8992/files/jorawixuxijuneterone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/universalidade_integralidade_equidade_e_sus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6671/0433/files/tekowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/vovelaxedenamivejekirazif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/energias_renovables_no_convencionales_en_chile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9102/5306/files/21391435085.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_off0000482e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x482E 5240 bytes
SHA-256: 2ee76dc70bc4534b8b864a0cc59aa5c4616086006a7d38864a9c1cb9c3f37281
font_01_sfnt_off00005a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A25 9648 bytes
SHA-256: a07095e1107fcf329621afb87aaef0850cb6aac3bf9e9a755f27e1ffed4a9dfa

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