Malicious PDF — malware analysis report

Static analysis result for SHA-256 856eac03603f83ec…

MALICIOUS

PDF

192.3 KB Created: 2020-08-20 09:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3c60f9179bd0d1263fc19f288331a0f1 SHA-1: 6d20dcd2aa40ba53b4c3ff95f96afd9d020a559e SHA-256: 856eac03603f83ec01198ab7a5c2f0541ee28fbcbb44f64e0d350237a576348f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link that redirects to a malicious URL, identified by heuristics as a redirector for SEO phishing. The ML classifier also strongly indicated maliciousness. The embedded URL is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=2nd+world+war+video In PDF document text
    • http://fuleni.drdavidnjacobsen.com/uploads/1/3/2/7/132712336/f6f0524d667ff4.pdfIn PDF document text
    • http://files.billsamsel.com/uploads/1/3/0/7/130739284/jipepevujikixaw.pdfIn PDF document text
    • http://files.mentoringfutureleaders.com/uploads/1/3/1/4/131438453/2a35f6a0016a.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/1/0432/3675/3570/files/finigegoxidivowaxugopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9415/5157/files/printable_lesson_plan_template_for_toddlers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dipudakafadaned.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2839/7728/files/36773604320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7437/9158/files/41144833850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/gisuzajug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0247/0306/files/pajafasuxasovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8511/1203/files/68621010832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7835/9967/files/12493832246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/26825335385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4209/4755/files/piziwofibopituvulamavirub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/28022539016.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_off0002bba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BBA9 4832 bytes
SHA-256: 20399770dd158f6fb610a15e5dc5d32bb6b6ef88cf36c2d29250c3b27415d732
font_01_sfnt_off0002cc30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC30 12012 bytes
SHA-256: 02e37e7a39abc93dfe02b5bb8417c623d5318d502c0f294f375efa93c475c9a6

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