Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf59b8544e3e6f4f…

MALICIOUS

PDF

53.9 KB Created: 2020-08-18 16:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 788cff3b772b46965da3de2f8cb9f364 SHA-1: 2d369e802b287c23db187854fec11126b0271670 SHA-256: bf59b8544e3e6f4f85f6d4d8555be940c8694059ac0e990a3f0dd73f250c33bd
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector, 'https://ttraff.cc/pify?keyword=adpcm+file+format'. This suggests the document is designed to lure users into clicking these links, potentially leading to further compromise. The presence of a link farm and a malicious redirector indicates a social engineering attack aimed at driving traffic to malicious infrastructure.

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.cc/pify?keyword=adpcm+file+format In PDF document text
    • http://zejukusi.weddingplansnicosia.com/uploads/1/3/1/1/131164250/2954888.pdfIn PDF document text
    • http://files.anglemidwest.com/uploads/1/3/2/8/132815019/80a593a.pdfIn PDF document text
    • http://files.alertdriving.co.nz/uploads/1/3/0/7/130775633/8799309.pdfIn PDF document text
    • http://files.dancelabnicosia.com/uploads/1/3/2/6/132681694/zepikisuj.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/1/0429/9633/4753/files/isotopes_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/mastering_algorithms_in_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/58312084279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0737/6534/files/xobodubezoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1427/4720/files/43038454987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3458/1911/files/20486185264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3649/0398/files/applications_of_laser_in_engineering.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8673/2707/files/gitumijupizifujewetodete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/feromarimozoruwizaguwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6660/5209/files/zazebobaliku.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 6

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_off00009492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9492 5112 bytes
SHA-256: 988b0ad72d8ca58f4f2e9b6b33bd96ab5c78a26634a53d3079f88a15974bc978
font_01_sfnt_off0000a5d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5D8 11024 bytes
SHA-256: 81bc5fd00be5f1beb371f4db2893dcb4902e00cde37923af1f4bf399f742a687

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