Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0f084336942cc27…

MALICIOUS

PDF

42.0 KB Created: 2020-08-16 11:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 81036b885beaf170147e59e2ae0c1712 SHA-1: 061498a5bc587749837ccab459e53aaaa1a1c84b SHA-256: c0f084336942cc272a8a6c293700107531a6673c949ce3538ea5615e6b9cf946
194 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains the same text as the URL's keyword parameter, suggesting a lure for a free PDF. The primary malicious IOC is the redirector URL, which is likely used to funnel victims 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.cc/pify?keyword=enciclopedia+de+aperturas+de+ajedrez+pdf+gratis In PDF document text
    • http://zejezifu.yukondaffodils.com/uploads/1/3/1/6/131606620/7754df15.pdfIn PDF document text
    • http://vukuleder.framedfashion.com/uploads/1/3/1/0/131071157/vofozobolezomivasu.pdfIn PDF document text
    • http://kipijosa.jomehndi.com/uploads/1/3/1/1/131164250/034ea27ceb44.pdfIn PDF document text
    • http://pulorov.mirkorakovic.com/uploads/1/3/1/6/131606746/c7033.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/1/0431/5791/3754/files/46172576234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4845/9675/files/11787941534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/tawewel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6225/3978/files/acrobat_reader_pro_bearbeiten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/sports_vocabulary_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2529/9606/files/gutajunup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1538/6789/files/martin_lawrence_tim_robbins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/mudimamalogev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3253/4422/files/manual_vertical_milling_machines_for_sale.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_off00006162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6162 5404 bytes
SHA-256: f0c5f4cddc60aa585c0aa6472ab3646e7d820c01a52cba4db52c249275cd1d8b
font_01_sfnt_off000073da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73DA 11660 bytes
SHA-256: dcc07f552b6b24b4dcb50143bcf6ca6fa78be7924aff1b8d5da0aa96642c1c3a

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