Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f75e1856d47523a…

MALICIOUS

PDF

45.5 KB Created: 2020-08-23 07:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67fcac159df8295cb1da024cce738229 SHA-1: fa9cb4b35c47172e18b7f9b776cfe797d29caa36 SHA-256: 2f75e1856d47523ae197c480f112f7456581c5ca3f0ec3f332c279cc916d5af5
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The presence of a 'download button' lure reinforces this. The document body, though heavily obfuscated, contains the malicious URL. The PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics confirm the malicious nature of the embedded links.

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=community+helpers+worksheets+free
    • http://files.shesthefirstwisconsin.org/uploads/1/3/2/7/132712006/dapuvizupedana.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/laponovafewusijos.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/vuporajukexedewi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8176/0935/files/fivefizesosetojotajak.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/meneroxuzowopewege.pdf
    • https://cdn.shopify.com/s/files/1/0438/9116/3291/files/falodoruzipoxovulado.pdf
    • https://cdn.shopify.com/s/files/1/0434/2480/9122/files/colonialism_definition_by_scholars.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/56134619159.pdf
    • https://cdn.shopify.com/s/files/1/0434/3532/7653/files/91637595025.pdf
    • https://cdn.shopify.com/s/files/1/0431/6525/3789/files/john_deere_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/30485793061.pdf
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/nodexule.pdf
    • https://cdn.shopify.com/s/files/1/0460/1351/3889/files/botines_plataforma_negras_mujer.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_off00007408.bin
655f7c741834458faa259aaac80dcc0a11a3ccfd2f39a7a0dfbcbad04f0b4497		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7408 5092 bytes
font_01_sfnt_off00008548.bin
27cb9d8e574432487ab6068bdb8cf63024a32711da5cfc8217093af75e959aa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8548 10460 bytes

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