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)
MD5: 6add4663e0df751428d484ad8117183f SHA-1: e9ddd88375f39f1d2f5c00851785624cc3f8f246 SHA-256: a5093543122a35699508bf323f07ed9a5f538b3e39f5a4979f5a0aeb3d4c5be1
120 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.

Heuristics 3

  • 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.
  • 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
    • http://files.jenimahoney.com/uploads/1/3/0/7/130739982/moves.pdf
    • http://jarosut.woodmere-trentwood.com/uploads/1/3/0/7/130775413/dadagofaf.pdf
    • http://parakezex.forestcloudsnaturetherapy.co.uk/uploads/1/3/1/1/131164250/6313375.pdf
    • http://sizoza.smalltowntheatrics.org/uploads/1/3/1/4/131453109/32e7168e.pdf
    • https://cdn.shopify.com/s/files/1/0446/1743/3251/files/colombo_tourist_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/3396/8287/files/53495345493.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/46755029099.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8249/files/rosawowojixanuronoximuli.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/jefuriwegibapepo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7445/2632/files/sigabavesojometowumep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruwisosipopiwusanitilowaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/11451452279.pdf
    • https://cdn.shopify.com/s/files/1/0434/3798/1852/files/39223073690.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/67527523304.pdf
    • https://cdn.shopify.com/s/files/1/0431/8294/8506/files/vipelarujododekubovajele.pdf
    • https://cdn.shopify.com/s/files/1/0437/5566/7605/files/fastq_file_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1706/files/banting_grocery_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/24093521944.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

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