Malicious PDF — malware analysis report

Static analysis result for SHA-256 55d50ec7b4576c77…

MALICIOUS

PDF

42.2 KB Created: 2020-08-07 21:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c55119adf566d977fc2bc842c68d4edc SHA-1: 2e89056164ea43c3a5487001ab844ce672de8564 SHA-256: 55d50ec7b4576c77b1b93191c8bd1b6d2b255566a6df63f7fbae85851753dc93
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector at 'ttraff.ru'. The document body also contains a call-to-action phrase, suggesting a lure to trick users into clicking the malicious link. The presence of multiple Shopify URLs, while some are confirmed benign, indicates a pattern of using legitimate platforms to host content that ultimately redirects to malicious infrastructure.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=asme+y14.+5+pdf+free
    • http://files.christschampionsministries.org/uploads/1/3/1/4/131437044/sobofelego.pdf
    • http://files.post111stl.com/uploads/1/3/2/8/132814048/ralijesagewog-wobelev-kisixidipu.pdf
    • http://files.rsgymnastics.org/uploads/1/3/2/6/132695329/4a2ac89628d523.pdf
    • http://files.unascakestudio.com/uploads/1/3/2/6/132682787/linosurewef.pdf
    • https://cdn.shopify.com/s/files/1/0430/7212/7125/files/agro_informatics.pdf
    • https://cdn.shopify.com/s/files/1/0436/5369/3593/files/hostel_building_plans_autocad_drawing.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tazoxusejeko.pdf
    • https://cdn.shopify.com/s/files/1/0440/4707/3445/files/jomizomoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3042/files/64560404140.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7952/files/lirijogutu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2825/6680/files/5780766314.pdf
    • https://cdn.shopify.com/s/files/1/0437/7287/0807/files/sizibilukawezuvevibiwasi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5324/3806/files/86334920511.pdf
    • https://cdn.shopify.com/s/files/1/0438/4086/4421/files/60368090311.pdf
    • https://cdn.shopify.com/s/files/1/0431/5601/3205/files/41208634307.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/
    • https://cdn.shopify.com/s/files/1/0431/1564/3042

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000584f.bin
474b81b4e3461930583c118e52ca02012e8b02879e372e5ceb400905e69c9f42
pdf-font-stream PDF embedded font (sfnt) at offset 0x584F 4776 bytes
font_01_sfnt_off00006898.bin
0186a8cd90ecd91786696b9f35d141529e51ffca704a8cd6cfcc6d12f4ff3694
pdf-font-stream PDF embedded font (sfnt) at offset 0x6898 10844 bytes
font_02_sfnt_off00008daa.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAA 4324 bytes