Malicious PDF — malware analysis report

Static analysis result for SHA-256 f72cbc7dad235896…

MALICIOUS

PDF

54.0 KB Created: 2020-08-01 08:02:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ae0e50bef9e78a2fa7b88e29899c5d9 SHA-1: a23a86ff9d02dd71c4fa4f5311de105ade534073 SHA-256: f72cbc7dad235896ce72f404eef5f11b807412ca34506c177238125e68884c80
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.com/pify?keyword=convert+rgb+to+hex'. Additionally, it exhibits a PDF link farm behavior, embedding numerous external links, with the primary one being 'https://cdn.shopify.com/s/files/1/0431/5519/4011/files/43997790842.pdf'. The document body, though heavily obfuscated, contains these URLs, suggesting the primary intent is to redirect the user to malicious infrastructure.

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=convert+rgb+to+hex
    • http://files.kindertimedaycare.com/uploads/1/3/0/7/130776487/f20f6c0c56f986.pdf
    • http://files.mindscapegallerystl.com/uploads/1/3/2/6/132683111/1329c.pdf
    • http://files.herplanetearth.com/uploads/1/3/0/9/130969637/bf049099567e72.pdf
    • http://files.adventuresinstem.com/uploads/1/3/2/8/132814400/rulutux.pdf
    • http://files.eric-goodman.com/uploads/1/3/1/8/131857213/5880873.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/43997790842.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2728/files/malformed_login_packet_runescape.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/11267601287.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2190/files/jupoboledugav.pdf
    • https://cdn.shopify.com/s/files/1/0431/6934/9794/files/23997789963.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/najizoxuzoreki.pdf
    • https://cdn.shopify.com/s/files/1/0433/7218/3703/files/95603283730.pdf
    • https://cdn.shopify.com/s/files/1/0436/9760/2713/files/jorokolabidowutipakeleli.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/tilasufamovavaweba.pdf
    • https://cdn.shopify.com/s/files/1/0428/1306/3327/files/4846982201.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/52309695642.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/ragopasi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/27501460496.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_off00008a78.bin
d188daf726c78eeb9200ff2c662f66848e5ab0f4a4f30bdefe3071f432115840		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A78 4700 bytes
font_01_sfnt_off00009a7c.bin
6acf670980e80e680568312ce5ab7b27c8afaf86ba0fdbec42e690989445b5a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7C 15312 bytes

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