Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c5d631769f7e23c…

MALICIOUS

PDF

43.7 KB Created: 2020-08-06 11:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 840d9d7f933a85120728762f8c4ff726 SHA-1: d79b8825b92418f2fc6d3153c084b0c43eaf7acb SHA-256: 7c5d631769f7e23c5dbe26b79672b7fb4a2c0a07b71643e927f230d64bb9e7d0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the ultimate destination. The document body, though heavily obfuscated, contains text related to 'procurement and supply chain management lecture notes pdf', suggesting a lure to entice users to click the malicious links.

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.cc/pify?keyword=procurement+and+supply+chain+management+lecture+notes+pdf
    • http://kikakarib.ikhenkle.com/uploads/1/3/2/6/132683014/gupejefanizame-xolekegaror-fovifofil.pdf
    • http://files.hempsteadtrackandfield.com/uploads/1/3/1/4/131483445/lotaxoje_nomipidobuva.pdf
    • http://files.wallstreetwhizz.com/uploads/1/3/0/9/130969746/2606151.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/563018742.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/zavenomalofalejuloz.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/game_of_life_quarter_life_crisis_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/wasolaraw.pdf
    • https://cdn.shopify.com/s/files/1/0433/6851/3686/files/cryptography_theory_and_practice_third_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/posujekuwimenememozajewu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/vewanoxakodobarutegokatew.pdf
    • https://cdn.shopify.com/s/files/1/0438/1959/7981/files/ziwifiba.pdf
    • https://cdn.shopify.com/s/files/1/0434/2625/0917/files/xanuvojifugikezuvizifo.pdf
    • https://cdn.shopify.com/s/files/1/0440/2823/1830/files/biological_science_scott_freeman.pdf
    • https://cdn.shopify.com/s/files/1/0437/7968/6549/files/pofexusulagelij.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/pozorivunofatoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4149/6981/files/aprendizaje_basado_en_proyectos_secundaria.pdf
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/32229490053.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_off00006b61.bin
8cdc67776cbe14cc2649c0d49b46cda59341c61813268ea5837753e4251cc02c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B61 5672 bytes
font_01_sfnt_off00007e89.bin
23efeef74b8ccead0b47d227aa9f32e9390007290e840711bb1e9523c4c0ef4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E89 10228 bytes