Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5093543122a3569…

MALICIOUS

PDF

40.5 KB Created: 2020-08-10 23:39:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6add4663e0df751428d484ad8117183f SHA-1: e9ddd88375f39f1d2f5c00851785624cc3f8f246 SHA-256: a5093543122a35699508bf323f07ed9a5f538b3e39f5a4979f5a0aeb3d4c5be1
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=las+brujas+no+se+quejan+libro+pdf'. This indicates the document's primary purpose is to lure the user to this malicious URL. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The file was generated by wkhtmltopdf, a tool often used to create PDFs from web content, which aligns with a redirection-based 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.ru/pify?keyword=las+brujas+no+se+quejan+libro+pdf In PDF document text
    • http://files.jenimahoney.com/uploads/1/3/0/7/130739982/moves.pdfIn PDF document text
    • http://jarosut.woodmere-trentwood.com/uploads/1/3/0/7/130775413/dadagofaf.pdfIn PDF document text
    • http://parakezex.forestcloudsnaturetherapy.co.uk/uploads/1/3/1/1/131164250/6313375.pdfIn PDF document text
    • http://sizoza.smalltowntheatrics.org/uploads/1/3/1/4/131453109/32e7168e.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/1/0446/1743/3251/files/colombo_tourist_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3396/8287/files/53495345493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/46755029099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7238/8249/files/rosawowojixanuronoximuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/jefuriwegibapepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7445/2632/files/sigabavesojometowumep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruwisosipopiwusanitilowaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/11451452279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3798/1852/files/39223073690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/67527523304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8294/8506/files/vipelarujododekubovajele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5566/7605/files/fastq_file_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4351/1706/files/banting_grocery_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/24093521944.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B82 5320 bytes
SHA-256: 9dacb206e9351fcb3da54267a01687aa69a102630bb6cca7552d95fcd2bfaf73
font_01_sfnt_off00006d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9F 11988 bytes
SHA-256: da720aa53db1578efc9feffa010cb4ae921bfd6524d1d660fdc95a6fac390337