Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6f71672f203dd9…

MALICIOUS

PDF

44.4 KB Created: 2020-08-08 20:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a6f84468090667f2dd64eb587ccf781 SHA-1: a6d1334e00a8bcbb13940e1f004060a251a59ebb SHA-256: cf6f71672f203dd9755402b10805f5150c14ddebc63dea0da35f0662396c799f
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=british+council+phonemic+chart+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0435/6797/2513/files/5313513236.pdf'. The presence of a visual download button lure further supports the malicious intent of redirecting users to potentially harmful content.

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=british+council+phonemic+chart+pdf
    • http://files.bardwellfarms.com/uploads/1/3/0/9/130969306/5440314.pdf
    • http://files.artmeanseverything.com/uploads/1/3/1/4/131483336/miwezelurazo-wezuz.pdf
    • http://files.integratedbodymind.com/uploads/1/3/2/6/132681368/65013.pdf
    • http://files.travelercountry.com/uploads/1/3/2/7/132710748/fisurudatasojun.pdf
    • https://cdn.shopify.com/s/files/1/0435/6797/2513/files/5313513236.pdf
    • https://cdn.shopify.com/s/files/1/0432/7908/9824/files/nalutewipiwox.pdf
    • https://cdn.shopify.com/s/files/1/0429/4747/7660/files/20508855406.pdf
    • https://cdn.shopify.com/s/files/1/0431/7439/6058/files/nekadinurijemojifotex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jenodilibaxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/73710276222.pdf
    • https://cdn.shopify.com/s/files/1/0429/2388/4711/files/kiretijadorot.pdf
    • https://cdn.shopify.com/s/files/1/0433/3325/5323/files/18421999416.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/bojezuberesudofumob.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/pisurewaxipuwonasodipotu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9658/8967/files/crossfit_bodyweight_workout_plan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/29878061118.pdf
    • https://cdn.shopify.com/s/files/1/0432/0962/1664/files/fijumokoruleze.pdf
    • https://cdn.shopify.com/s/files/1/0428/3439/5295/files/dominoes_quick_starter_ali_baba_and_the_forty_thieves.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_off00006058.bin
40a722ea787b9b03b541a16f407f4393052414114f271810e89a4b26ac9b556e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6058 5324 bytes
font_01_sfnt_off00007242.bin
091a22ce4ae62c6c781a4f65f10330eb6935a75c498ad454dc787211eac04491		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7242 10648 bytes
font_02_sfnt_off00009663.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9663 4324 bytes

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