Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95bd85e3303bf7e…

MALICIOUS

PDF

33.6 KB Created: 2020-08-15 20:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01f4918f5e5d2f333abb874ec3c60ac6 SHA-1: 3cbeba99da31deb16ae017b467e22928737a36c4 SHA-256: b95bd85e3303bf7e47fb57b481d6477bb98ce32649c62acf1b814ffd3fdf8795
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=lady+bird+lead+sheet+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains. No scripts were extracted, but the presence of the malicious redirector URL is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=lady+bird+lead+sheet+pdf
    • http://files.railoun.com/uploads/1/3/1/4/131455463/5895014.pdf
    • http://files.earth-protect.org/uploads/1/3/0/7/130739155/kilat.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/verify_stokes_theorem_examples.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/nivorebuvuxajazu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/56873725566.pdf
    • https://cdn.shopify.com/s/files/1/0453/9252/7528/files/systemic_anatomy_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/horarios_cercanias_zaragoza.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/69051512702.pdf
    • https://cdn.shopify.com/s/files/1/0431/2150/8506/files/centric_relation_and_centric_occlusion.pdf
    • https://cdn.shopify.com/s/files/1/0440/3236/0613/files/kuzezejaxamotux.pdf
    • https://cdn.shopify.com/s/files/1/0439/0181/2904/files/trends_in_the_periodic_table.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gatafuruzakelimosileraji.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/temimozumonipedimawuvekuz.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_off000045ad.bin
55dcd04e8c39383839d825331fd75691b0eca1f30702985518ff082bf807e0d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45AD 5312 bytes
font_01_sfnt_off000057b9.bin
cf49e4995b78be8b048dddc1e98998dc48d713fc55850fffbe0041d06b941533		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57B9 10016 bytes

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