Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ecb68d6086953c…

MALICIOUS

PDF

43.5 KB Created: 2020-08-24 21:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a5798700e2e38e33977daf5be585f1a SHA-1: ac1e399be504ae18beb63e13c61e602fad672024 SHA-256: c1ecb68d6086953ca746e45d537768d2d23f991afc197c55cd365731c4cbc2d9
128 Risk Score

Malware Insights

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

The PDF contains a lure for a fake invoice or payment, as indicated by the 'SE_INVOICE_LURE' heuristic. It also contains a malicious redirector link to 'https://ttraff.ru/pify?keyword=free+painting+estimate+template+excel', which is flagged by 'PDF_MALICIOUS_REDIRECTOR_LINK'. The document also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, as noted by 'PDF_SEO_LINK_FARM'. No scripts were extracted from this sample.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=free+painting+estimate+template+excel
    • http://files.diled.eu/uploads/1/3/0/7/130775968/e21cf8fd1f16e4.pdf
    • http://files.athan.com/uploads/1/3/0/8/130814169/tesor_gaviwe.pdf
    • http://zurexunus.wayinn.com/uploads/1/3/1/4/131409090/pupuvonepanebig.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/jolijasol.pdf
    • https://cdn.shopify.com/s/files/1/0437/8168/5406/files/java_project_source_code_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/5370/3577/files/61145673527.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/sing_your_face_off.pdf
    • https://cdn.shopify.com/s/files/1/0460/3992/4900/files/dunarem.pdf
    • https://cdn.shopify.com/s/files/1/0450/6664/9750/files/25182302236.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/kobomizig.pdf
    • https://cdn.shopify.com/s/files/1/0449/4458/8959/files/jesibeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4882/files/nadeto.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/95341073106.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/aprender_a_empreender.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_off00006cec.bin
3ebe3ca8a065440aa9c74e26abfe3e2960c636badbd746c7ee2d126577df20cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEC 5276 bytes
font_01_sfnt_off00007ec9.bin
c5d30d97e43ed992fbb9b69704e80590b4f1515ac974f8f55f1fdecf332e2dec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC9 10128 bytes

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