Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e722e32a8551eb…

MALICIOUS

PDF

51.5 KB Created: 2020-08-15 06:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cff24b84163b61e996a382985f4122a9 SHA-1: a05c87c49b498479a71ebce7eb6964b40618d46d SHA-256: a4e722e32a8551ebaab38d48a18e88c6a4f76efce4e87b049edf346acb1c820d
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a password-protected archive lure, suggesting it's designed to trick users into downloading a password-protected file, likely containing malware. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm strategy to obscure the malicious redirector.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=avatar+pc+game++highly+compressed
    • http://lefaw.ericaldama.com/uploads/1/3/0/9/130969959/wasirozuvinobugiran.pdf
    • http://gidogu.erikahanneson.com/uploads/1/3/0/8/130874493/fokidapokifilam-biver-giripufawaxe.pdf
    • http://files.healingneck.com/uploads/1/3/1/8/131871605/boloku.pdf
    • https://cdn.shopify.com/s/files/1/0437/6405/6225/files/77583985254.pdf
    • https://cdn.shopify.com/s/files/1/0440/4386/2181/files/tedigedezevoxojakabu.pdf
    • https://cdn.shopify.com/s/files/1/0439/1695/1704/files/mathematics_for_economists_2.pdf
    • https://cdn.shopify.com/s/files/1/0436/4887/6702/files/974973739.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/29665946213.pdf
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/fowirat.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/rekes.pdf
    • https://cdn.shopify.com/s/files/1/0431/3494/3388/files/74970818468.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/28871027367.pdf
    • https://cdn.shopify.com/s/files/1/0435/3844/8548/files/47763615095.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.pdf
    • https://cdn.shopify.com/s/files/1/0428/8996/9820/files/1617107561.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8196/files/beduganulota.pdf
    • https://cdn.shopify.com/s/files/1/0437/1179/1257/files/tavegikajokotenisafipobov.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cc3.bin
dbf287a5e637d6ab9d643afc7c478aada7d035cf14af17e73ceefe4758aa0269		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC3 5320 bytes
font_01_sfnt_off00008ee0.bin
cf33d954b411e7efc24c4a2756a2c0a5ae3344b8818943e5db07428355a79570		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE0 10548 bytes
font_02_sfnt_off0000b2d2.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D2 4324 bytes

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