Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af2423a063debc0…

MALICIOUS

PDF

59.8 KB Created: 2020-08-12 15:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1e3679be6ea9089027e62e43ea989b8c SHA-1: 0e59f2c528df5ed76c9065ce6f229c726f38a4da SHA-256: 0af2423a063debc0a120a6c313f4413b14687a3309dc43561e2368efdfeb2994
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to appear as educational resources, but they redirect to a malicious SEO link farm. The primary redirector URL is https://ttraff.com/pify?keyword=cbse+class+10+biology+chapter+1+notes+pdf, which is flagged as malicious. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=cbse+class+10+biology+chapter+1+notes+pdf In PDF document text
    • http://files.integrium.co/uploads/1/3/1/3/131383586/tadoxepeve.pdfIn PDF document text
    • http://kexugut.shalomsart.com/uploads/1/3/1/1/131163599/warepunojekeg_jegajuniwajalu.pdfIn PDF document text
    • http://files.vertsdispensary.com/uploads/1/3/0/8/130813846/kodiluzufenuwejozu.pdfIn PDF document text
    • http://runofaj.sodacitygymnastics.com/uploads/1/3/1/3/131383483/6972175.pdfIn PDF document text
    • http://jumila.shivapianostudio.com/uploads/1/3/0/7/130738732/6690118.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/1/0431/2072/2080/files/birufigejogav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9181/0717/files/19760351531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6726/0582/files/47288460635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/34717259594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4349/9677/files/positive_affirmations_for_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/76008383061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/22479982647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/gigafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7095/5424/files/17072668259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5911/7206/files/92466529482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/coliformes_totais_na_gua.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_off0000ac0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC0E 5756 bytes
SHA-256: f2cafb2039862780663813d339b428e1dfa00b520e0c85432712eabd4d24ba48
font_01_sfnt_off0000bfa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA0 10080 bytes
SHA-256: 85d5d80085e0beb7e5154c6c13740fa9e55467dbbadd9e7bd9f9cb09357431ac

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