Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4daf231033979dc…

MALICIOUS

PDF

40.8 KB Created: 2020-08-20 03:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1eeaeee58972ec719aaa35b65c07194e SHA-1: 422f5d3d8f12278bbadcc1268b871117e3972e50 SHA-256: a4daf231033979dc0d7b936e1045c95fe06e96bd244a1df40446e0d38e4d7c23
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be a link farm designed to either distribute malware or engage in SEO abuse, leveraging the 'ttraff.ru' redirector.

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=convert+date+format+bash In PDF document text
    • http://jukaj.cognitivecardiowithmsmm.com/uploads/1/3/1/3/131384260/9811158.pdfIn PDF document text
    • http://sakok.breakingrulespublishing.com/uploads/1/3/1/0/131070590/mowedogilabafak.pdfIn PDF document text
    • http://files.sturtmoor.com/uploads/1/3/0/7/130776809/zekafap_giguzus.pdfIn PDF document text
    • http://desivu.ironfitnesscroydon.com/uploads/1/3/1/4/131452883/kidodiwozarube.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/1/0434/7595/9973/files/biology_textbook_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/69565814886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5287/5432/files/lord_you_are_always_here_with_me_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/5845/5705/files/samsung_themes_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6160/4505/files/bkash_app_now.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/8921/7960/files/xunexat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/56458315578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9163/9968/files/difference_between_bolt_and_screw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/turret_lathe_machine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/dakuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7773/8399/files/kojujesivutolijada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4071/0566/files/64485409483.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 2

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_off00006022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6022 5220 bytes
SHA-256: bb483c1a03d1d9fef9243dda76bb13da5f0298bc7ef2abcce0a0c4a33cf6dc5c
font_01_sfnt_off000071bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71BB 10804 bytes
SHA-256: df20fbe9ed3164222a590138e225cf1c849ac09fafd7c2918fe9cb571d1bcd72

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