Malicious PDF — malware analysis report

Static analysis result for SHA-256 a91e7e467ddb4704…

MALICIOUS

PDF

53.8 KB Created: 2020-08-10 18:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3338babac911644085ac227c2b4dd512 SHA-1: 565a09b3c20d47f0c4e9c36c6ce738c6f5253f22 SHA-256: a91e7e467ddb4704d20d193b9a903618f7e83f631b50aae379b44eb614b2b5b3
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document is designed to trick users into visiting a harmful site, likely for phishing or malware distribution.

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.ru/pify?keyword=statistics+probability+problems+and+solutions+pdf In PDF document text
    • http://files.cook-meet.com/uploads/1/3/1/4/131437249/210074.pdfIn PDF document text
    • http://files.wordsmithresults.com/uploads/1/3/1/4/131452997/bipev-zepofidapezubif-mutop-sewomaforuwolat.pdfIn PDF document text
    • http://files.richherbalgardens.com/uploads/1/3/1/4/131409526/mobinajop.pdfIn PDF document text
    • http://files.countrylandforsale.com/uploads/1/3/0/8/130874058/xunib-gawimisi-talap.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/1/0436/4995/8046/files/97313191925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5222/6974/files/mufadaxidezekerewole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0645/9029/files/goxonuwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2232/6696/files/77112047776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2215/3890/files/giketufusisuliboxetilodig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/mastering_software_quality_assurance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58933331969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8321/9619/files/31458372546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/vanelokawepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/34724923172.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5988/5733/files/66819295923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5639/0559/files/elementary_statistics_triola_3rd_edition.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_off00009296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9296 5644 bytes
SHA-256: 3233b05354fe5552e5000751902df05a5a625170bd911a45450445efcd0d6016
font_01_sfnt_off0000a5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A6 10544 bytes
SHA-256: 166fab6992467edbdcbe1a2f61ef4df261c86e2b78aed47238beb533afc60380

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