Malicious PDF — malware analysis report

Static analysis result for SHA-256 4697390b4eed16dc…

MALICIOUS

PDF

45.5 KB Created: 2020-08-29 20:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85d0ca5c4a17089f37fe4ebb92d2d982 SHA-1: 5d902787062870325e9bc87fb234e11f213fd4c3 SHA-256: 4697390b4eed16dcbc62830ced6f079abe0a6db860cc517c0a875025a1971e2a
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct link to potentially harmful infrastructure. The 'PDF_SEO_LINK_FARM' heuristic suggests the PDF is part of a larger scheme to generate traffic or distribute content through numerous links. The primary IOC is the malicious redirector URL, which is likely used to funnel victims to a phishing or malware download site.

Heuristics 3

  • 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.
  • 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/wix?keyword=demonstrative+pronouns+worksheet+gra
    • https://cdn.shopify.com/s/files/1/0433/6680/9765/files/reaccion_diels_alder.pdf
    • https://cdn.shopify.com/s/files/1/0434/5554/5497/files/ordering_real_numbers_worksheet_8th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0431/4329/9232/files/22927305020.pdf
    • https://cdn.shopify.com/s/files/1/0438/0763/7661/files/3620097497.pdf
    • https://static.usrfiles.com/ugd/b8c837_adcc115665af4fb4aed394875277abb9.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_6267a66be3994b0cb13b2fd7adb226bf.pdf
    • https://static.usrfiles.com/ugd/76156b_5a5ad7d6382d4759a118c2147c5f7d3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_83c94c35d1d04a19bc32a8329cb88f04.pdf
    • https://static.usrfiles.com/ugd/b8c837_2526511def294fe18bce66adcfdb3219.pdf
    • https://static.usrfiles.com/ugd/c20ea7_5cb8bbaf3ccd41959ff16604de8c17de.pdf
    • https://cdn.shopify.com/s/files/1/0433/8837/1107/files/felogokowodewixojavewat.pdf
    • https://cdn.shopify.com/s/files/1/0436/9874/9608/files/14156229299.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_off00007455.bin
bf7e498f0872485f0aa939a57c70791b4cd9fffa379892f9e85a49dea17f110b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7455 5416 bytes
font_01_sfnt_off000086b6.bin
619a2d0dad2b11a93544ded2bcd5e979be5e863d3bc5b813202025bd184894bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86B6 10040 bytes

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