Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c571ece4c4f5c4c…

MALICIOUS

PDF

38.2 KB Created: 2020-07-27 21:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7cb120395564a8e53a62a4aed2bd8c2d SHA-1: 393ec2b39ee6098f09edb2bee6dbb360f98d5984 SHA-256: 8c571ece4c4f5c4cbf96e6cf9bdf8aa842a3194cc91c0029dcf173e25c1eb4ff
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with at least one pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct attempt to lead the user to harmful content. The 'PDF_SEO_LINK_FARM' heuristic suggests a broad distribution strategy, likely for phishing or malware delivery. No scripts were extracted, but the presence of numerous links strongly suggests a social engineering attack.

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=d%2526+d+basic+set+rulebook+1983+pdf In PDF document text
    • http://files.wcpha.org/uploads/1/3/1/4/131437626/salulo.pdfIn PDF document text
    • http://files.warrnamboollawntennis.com/uploads/1/3/1/0/131070469/gezujijab.pdfIn PDF document text
    • http://files.needybeastshaven.org/uploads/1/3/0/9/130970004/lanuragokeziburamig.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/1/0431/6784/2459/files/55122724659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/fuvori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6241/8846/files/31157283061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7897/5639/files/fatufixerowibexezek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1313/6799/files/60275355781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0496/0661/files/72607175342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7238/8249/files/tudamufuwikin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/94939136097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/tunibutepupozufuji.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_off00005e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E10 3484 bytes
SHA-256: 33019dbc7dce146be9396d22118e5eda0a3a9187904cdfdddb9ce8b8b2194f61
font_01_sfnt_off0000697c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x697C 10240 bytes
SHA-256: f69aea2332e37d116503bdc698e8a6c534b184359fa3f0caa955ae07e7de664f

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