Malicious PDF — malware analysis report

Static analysis result for SHA-256 2553c27623875392…

MALICIOUS

PDF

39.6 KB Created: 2020-08-24 16:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e91146b25a7f2af5ca34be6d715703ec SHA-1: 85f179c039df9496738a5358e80c34869c1c5fe4 SHA-256: 2553c276238753923dc0f61c07d806755d5c31851e4a45bf99ebb59a91fa80fb
194 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, primarily through its extensive use of embedded links. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that at least one link points to a known malicious redirector service, ttraff.com. Furthermore, the PDF_SEO_LINK_FARM heuristic reveals a large number of external links, suggesting an attempt to obscure the true destination or engage in link farming. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this document.

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=chunkfive+ex%2528+regular+font+free In PDF document text
    • http://files.jillwongphotography.com/uploads/1/3/1/3/131380107/pikevete.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/1/0429/1615/1462/files/73358748274.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3028/1377/files/55214582816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/76050795975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2866/5752/files/soclean_cpap_cleaner_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1661/8145/files/levilakikopabivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7433/8454/files/fufidobusoxawewagujow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/71302023926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8435/6509/files/43743752355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8901/7497/files/protestant_and_catholic_reformation_timeline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2160/6818/files/zasunivijivaruwuful.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_off000058ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58EA 5024 bytes
SHA-256: ba9c412e4ddf81b90f45e75692e0d16d719c947aefa00e20da444d0b999bec24
font_01_sfnt_off00006a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A14 11912 bytes
SHA-256: c7fc4e8afe14b87ea94712d4040b83dc695c9763b322042058f14548996a8b69

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