Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c636e85c3a55058…

MALICIOUS

PDF

42.9 KB Created: 2020-08-14 14:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0bda9637ef92fb3b184a1ae41b74eb7c SHA-1: b569e3d199373fe8ee846be22f94b28a41b8b403 SHA-256: 4c636e85c3a550582d5e0410c99658932c027b796e9a610c0d28e27bffc1c9f1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The redirector URL is https://ttraff.ru/pify?keyword=bash+shell+scripting+tutorialspoint+pdf, which likely leads to a malicious payload. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and contains embedded URLs, further supporting the malicious intent.

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=bash+shell+scripting+tutorialspoint+pdf In PDF document text
    • http://xunifu.reunionphotos.net/uploads/1/3/1/4/131410812/2550254.pdfIn PDF document text
    • http://files.sanantoniooutdoorliving.net/uploads/1/3/0/7/130738835/4940825.pdfIn PDF document text
    • http://files.verdancecreations.com/uploads/1/3/1/6/131607522/tewovudinubelepugi.pdfIn PDF document text
    • http://togemi.alma-leather.com/uploads/1/3/1/0/131070872/1868925.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/1/0431/5149/1236/files/sonexometisokeloniziribu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/75971195829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9423/5553/files/anastasius_bibliothecarius.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8374/2884/files/virilopaxeduvisozab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4818/1666/files/posotimilobolodolokixew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/0813/4053/files/informe_de_auditoria_de_sistemas_de_informacion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/predator_generator_8750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5124/5987/files/82727724133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3046/1081/files/jurnal_biosistematika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5630/7107/files/dipole_antenna_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7419/0498/files/voxuv.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 3

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_off00006650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6650 5468 bytes
SHA-256: 9c5d64747bbbd3c264f631b33107834d679b255d2123c4fbc666f76e2ba861e0
font_01_sfnt_off000078d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D9 11112 bytes
SHA-256: 6f9a1c52f208c2c6ccb9639b1070a26daf52a6c26d120ada17ba5d263bb7c570

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