Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a53c92850319d5b…

MALICIOUS

PDF

46.3 KB Created: 2020-08-25 04:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3f622bc0b2d8f4dc4e0453e8b4b35def SHA-1: 3e264345beaeb0251012bb1a60ad12080512f8ca SHA-256: 3a53c92850319d5b9884dffa51e264b84002c5e19bc7b542d9a7ca86e29e040a
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though heavily obfuscated, contains text related to 'daycare registration form template word' and the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely for SEO manipulation to increase visibility of the malicious link.

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=daycare+registration+form+template+word In PDF document text
    • http://files.mesabikerace.net/uploads/1/3/1/8/131858044/gafomuxe.pdfIn PDF document text
    • http://melixip.familypromisegf.org/uploads/1/3/2/7/132740214/wusedul.pdfIn PDF document text
    • http://xesixi.vogelsangartwork.com/uploads/1/3/1/1/131163635/3564726.pdfIn PDF document text
    • http://mogokoju.nickrichardshq.com/uploads/1/3/1/8/131856772/9140530.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/1/0430/2841/4618/files/lumuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3425/5265/files/kevuvojal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2148/3687/files/46298796281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3413/2131/files/daxamewop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/50365846683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9523/6509/files/paliroroki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7537/0136/files/73187337362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/milijevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/zisunekefakatarijesevoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6467/0873/files/broadcast_listener_service.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/general_mathematics_10th_class_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2396/5080/files/app_scanner.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_off00007639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7639 5668 bytes
SHA-256: 5fa8f573aafaee8e1c37163739dc45cb3c2f043c9586b7e9421b94c61dbf045a
font_01_sfnt_off00008986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8986 10224 bytes
SHA-256: d0d7ad9fe1f3e7775d6629179e70cef95211d73e2b0d8830b6b084254181a7c8

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