Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e6a33d3049fa4f…

MALICIOUS

PDF

49.5 KB Created: 2020-08-15 03:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 21f1229a64d89dd4f0fe05ce2dd08da6 SHA-1: da0edd71a06da6ff58aac3d38ea74336c0d48258 SHA-256: 57e6a33d3049fa4fca71ddc9b4823c633ee0af1e4daa7969aa1885940ef7b2ed
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. This indicates a link farm or redirection attack designed to lead users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=fuentes%20formales%20del%20derecho%20penal%20pdf In PDF document text
    • http://files.holistichealingnow.com/uploads/1/3/1/4/131437736/gosuzolagof_vunet_fodazujamunobam.pdfIn PDF document text
    • http://files.postplumbingheatingandair.com/uploads/1/3/2/6/132695574/zuwubavuz.pdfIn PDF document text
    • http://vaxax.anniebondpottery.com/uploads/1/3/2/3/132303354/9718586.pdfIn PDF document text
    • http://ludidasu.commercial-doors.co.uk/uploads/1/3/1/0/131069934/f529680afd.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/1/0435/6728/4379/files/puxufufovigafudul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/nepuwolapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0958/6846/files/78965584555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/git_add-_all.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/autumn_leaves_classical_guitar_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/15343659099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/circuit_breaker_abb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8408/6424/files/real_estate_lead_follow_up_email_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2392/5402/files/bio_data_form_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4071/8493/files/xupibikadelemegovotom.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 4

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_off00008345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8345 5352 bytes
SHA-256: 03bef2ceeb2a4afdd3ad11b131f354450a252e38281abc3ded7e3607123d9238
font_01_sfnt_off00009549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9549 10992 bytes
SHA-256: 6738b268d095b428b107acf5b69c5b2b44677b9f6aa5bd368fd264c630418d34

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