Malicious PDF — malware analysis report

Static analysis result for SHA-256 c918eda34fd46a0e…

MALICIOUS

PDF

39.7 KB Created: 2020-08-19 11:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf624579454bae3d571e8f3325f7403b SHA-1: acadf495cb3c2650b5a6ec838b0ce1146a380db3 SHA-256: c918eda34fd46a0e10d656dfb3bffdfc39b01b87c5a11ba01088c22b94ecec2f
140 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a "Whatsapp per pc mac" download. The link leads to `https://ttraff.com/pify?keyword=whatsapp+per+pc+mac`, which is a known malicious redirector. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the final malicious destination. The presence of a QR code lure further supports a phishing or social engineering attack vector.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=whatsapp+per+pc+mac
    • http://files.agnesdaynursery.org/uploads/1/3/1/3/131384113/jaxisuwerin_kudogud.pdf
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/67199270375.pdf
    • https://cdn.shopify.com/s/files/1/0435/6797/2515/files/pevunarivusimabevodasosa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/samilunudivero.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3537/files/xikevamad.pdf
    • https://cdn.shopify.com/s/files/1/0439/5529/0270/files/introduction_to_heat_transfer_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/2251/4338/files/call_of_duty_pc_terbaru.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/rikapagikixewini.pdf
    • https://cdn.shopify.com/s/files/1/0434/9198/3512/files/vigezodisalafokekumuji.pdf
    • https://cdn.shopify.com/s/files/1/0431/7364/2406/files/44448364658.pdf
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/drdo_ceptam_09_a_a_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3253/files/39152034314.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_off00005ecf.bin
395112a0f8ba03e10cab15e943d6c6f1d87614c1af4e01eabcfa940b1b556bb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECF 5152 bytes
font_01_sfnt_off0000703c.bin
04508bcd427126bf8ded657b8f6e6618f16c40bc83e1357e1c0efac4527ffa93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x703C 10088 bytes

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