Malicious PDF — malware analysis report

Static analysis result for SHA-256 a12feb315bbd9954…

MALICIOUS

PDF

46.5 KB Created: 2020-08-08 03:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e1ed7cd15f3b0509d034efef744f4a32 SHA-1: 2e8098e2ddb564981c7268211e11bbb2c6b37e36 SHA-256: a12feb315bbd99542a337985de61ca0947dd4fed199a5343e615f399519c5a84
194 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to downloading chess openings in PDF format, suggesting a lure. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious classification. The primary IOC is the redirector URL, which is designed to lead users to further malicious content.

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=descargar+aperturas+de+ajedrez+gratis+en+pdf In PDF document text
    • http://nexapodov.wvrra.org/uploads/1/3/0/7/130776031/tulidobinosibimaka.pdfIn PDF document text
    • http://danerezox.kdchanelbeauty.com/uploads/1/3/1/0/131070786/lijego.pdfIn PDF document text
    • http://files.anchorsaweighfarm.com/uploads/1/3/1/3/131381772/2299552.pdfIn PDF document text
    • http://files.sandaharrboerboels.com/uploads/1/3/2/6/132681566/6896535.pdfIn PDF document text
    • http://files.timperleygardencentre.com/uploads/1/3/0/7/130739308/6309311.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/1/0431/2068/9306/files/pirukifatajijemav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0859/6900/files/98369799797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5238/3904/files/lidelofakodutelira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/42802115973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1757/6354/files/les_capitales_des_pays_du_monde.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/60359889104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/maikling_balagtasan_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1796/8536/files/absceso_dentoalveolar_agudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7098/8188/files/xiregixomoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/xelokuxuwulegotakobiwu.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_off000073ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73AE 5416 bytes
SHA-256: 0bfa9bee3a749c4f80811eff0dc66896f8805832733582729e7c9749548d3277
font_01_sfnt_off0000863f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x863F 11336 bytes
SHA-256: 074f11d78a0ab29ec564efe3a97a45adc1841a3410870f3bea47fbc25f57ff08

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