Malicious PDF — malware analysis report

Static analysis result for SHA-256 e674f4a62098b8ad…

MALICIOUS

PDF

48.9 KB Created: 2020-08-11 04:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bb225516a4a2f04720522d1b783b008 SHA-1: 7d6504925fb02efbc780d37f50c0b51f21c840a6 SHA-256: e674f4a62098b8ad6236c99b901b9867e5b171cff2220084deab2c27afa1709a
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to potentially malicious content, as indicated by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary redirector URL is https://ttraff.ru/pify?keyword=limbajul+trupului+allan+pease+pdf+download. The document body, though heavily obfuscated, contains this URL and numerous other links to PDFs hosted on Shopify, suggesting a SEO poisoning or link farm tactic to distribute malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=limbajul+trupului+allan+pease+pdf+download
    • http://zawel.efmracing.com/uploads/1/3/1/0/131070476/gilejitapumijororug.pdf
    • http://files.gavinrutherford.co.uk/uploads/1/3/0/7/130775085/duwabu_zefixuno_gevuba.pdf
    • http://files.gtsaustralia.com/uploads/1/3/1/6/131637240/27a2d0e643f8c.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/bifedavagiwozigiwizeze.pdf
    • https://cdn.shopify.com/s/files/1/0429/0274/9347/files/artist_way_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/6787/5228/files/62710260869.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lorirazapevimixawas.pdf
    • https://cdn.shopify.com/s/files/1/0432/6549/1107/files/yahar_gul_chapel.pdf
    • https://cdn.shopify.com/s/files/1/0434/0449/2965/files/34141012709.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nuvororixepexovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0820/files/robenefekinagajokadagapa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2661/1357/files/robexawenekiramulumijupa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/definicion_de_plaquetas.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/kuvibekalunasag.pdf
    • https://cdn.shopify.com/s/files/1/0450/5577/0776/files/newspaper_activities_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/0307/4971/files/nerimoxofinazulojimog.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_off00007dec.bin
4f6b416e3de9a257cb0c8e82e59421666382445b52b46e80a880e1272d40ca93
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEC 5436 bytes
font_01_sfnt_off00009059.bin
8a9f18952e23f5ce44ff896f148aa74f3fab1b528ce4a28dc4864392d276e18e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9059 11240 bytes