Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c5b80d535aa9f7…

MALICIOUS

PDF

36.0 KB Created: 2020-08-24 04:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6dc03b6b78175a7ac083ad8e91a1ad68 SHA-1: f953a941ec71c9df7a613926842b66958c374abb SHA-256: 99c5b80d535aa9f7dc42f1bfc3b32bd4d4c2608b6e2996a16360db92e5c8766a
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link that redirects to malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and heuristics suggest a lure to download a font pack, which is likely a pretext for delivering malware. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, many hosted on Shopify, pointing to a potential link farm or distribution network. The SE_DOWNLOAD_BUTTON heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=adobe+illustrator+fonts+pack In PDF document text
    • http://files.bluemarlin3grancanaria.com/uploads/1/3/1/4/131437532/wilamejupusuvitamiv.pdfIn PDF document text
    • http://files.cayugalakehouse.net/uploads/1/3/2/7/132712326/wabef.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/1/0428/7420/8415/files/14885033727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8457/1031/files/74668041590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5388/3293/files/rolisiliketa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/6644/3164/files/93662274079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9163/9966/files/92469451272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8660/0609/files/buderus_logamatic_rc310_bedienungsanleitung.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/kabepabak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9317/9030/files/daily_attendance_sheet_in_excel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/rudogigajizamopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/zufugawabid.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_off00004f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F28 5344 bytes
SHA-256: ebf60573d5aad872b7e489648b9d4c9b08a2a231d09410eede42cb445f1cddc4
font_01_sfnt_off00006156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6156 9988 bytes
SHA-256: 48b0d7c9c1e895214a981eaa325fa9ee47c4a41ac487e274065430455e887423

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