Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a25417993a96f5f…

MALICIOUS

PDF

44.7 KB Created: 2020-07-29 22:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f5880b014831fac60c10f1f85ebb16ad SHA-1: 2a69444a2559fd79aca716de9a55aec677f9d88e SHA-256: 8a25417993a96f5f9f8eb69abc9c8cc3e121dcf2135dc40e8fc63d7f9c20e47d
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and heuristic analysis. It contains a large number of embedded links, many of which point to known malicious redirectors or SEO spam pages designed to host malicious content. The document body, though heavily obfuscated, suggests a lure related to 'spatial statistics book pdf'.

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=spatial+statistics+book+pdf In PDF document text
    • http://files.thewonderfuelcompany.co.uk/uploads/1/3/1/6/131636946/jivag-bejen-dukelatepa.pdfIn PDF document text
    • http://files.laurellpottery.com/uploads/1/3/0/7/130776416/e176f887a.pdfIn PDF document text
    • http://files.humanityreboxed.com/uploads/1/3/1/1/131163914/768925.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/1/0439/3720/2344/files/notupafulekatikawiduvim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/ratowesirikumarejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98048873934.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1564/3041/files/benot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/rulezeputemiravufabezez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/wubijepaxusep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4952854333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/wugotus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0886/8008/files/jujebafilapabarawasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2926/4546/files/piwew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/kajewumiwofate.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_off000072b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B3 4924 bytes
SHA-256: 3a7131192928949c308c954e21ae93ce8a3c6474cff86653ee6a587c862b7ce7
font_01_sfnt_off00008362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8362 10040 bytes
SHA-256: 3cfe8206ebd5b324e6d0e19f75b6f52f2175e89f60a92c752164cf4baebf5c63

Open this report in the interactive analyzer, or submit your own file for analysis.