Malicious PDF — malware analysis report

Static analysis result for SHA-256 850f67c805c462eb…

MALICIOUS

PDF

42.2 KB Created: 2020-08-15 01:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b378cd27aa1d78908f723fa905be3cf7 SHA-1: f0d66df4853a48cafb7c479368b8344f1da74fe6 SHA-256: 850f67c805c462eb4c292225379714c27544dc199df45449f480d71f6d370014
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links, including one to a known malicious redirector, suggesting a phishing or scam attempt. The document body and heuristics indicate a lure for 'Bkav pro crack', which is a common tactic for distributing malware. The presence of numerous external links, many pointing to Shopify-hosted PDFs, further supports the SEO link farm and redirector heuristic, indicating an attempt to drive traffic to malicious infrastructure.

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=bkav+pro+crack In PDF document text
    • http://varojuz.emergeinmarketing.co.uk/uploads/1/3/2/3/132303072/gamidudatedimadusulu.pdfIn PDF document text
    • http://files.fauxmesticgoddess.com/uploads/1/3/1/8/131856381/gevaxil.pdfIn PDF document text
    • http://files.huttvalleysportsawards.co.nz/uploads/1/3/0/7/130739918/nimenomuner.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/1/0434/3277/1750/files/matplotlib_color_maps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48675385277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4044/8407/files/rajuxirifurazoxesuwute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/motemadifex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0124/2022/files/vemasirewakeliketupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4563/2665/files/10483671944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6245/0586/files/337637116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/17230510256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7514/9719/files/45753864137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5883/0229/files/how_to_make_a_discord_server_active.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_off000061f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F6 4892 bytes
SHA-256: 8790e265498aec4e80b0f12f7fc0b8c4b6a27c2cfa6f2a4281e21e0ce616ecbe
font_01_sfnt_off000072b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B0 13152 bytes
SHA-256: 4768cee5493b765ea21da87f032d196f2ff866e5a33b7c149becdb6d306e1bd6

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