Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf4e55a91f6d0ead…

MALICIOUS

PDF

56.0 KB Created: 2020-08-19 09:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c5cdb3807b1a67c4a61a5c05fc3ea27 SHA-1: 44042fcacb4669b8a0da6aac235f7b50b3ec426b SHA-256: bf4e55a91f6d0eadd6cfac7f953d994f89cf9b28476c5ce3e123078c6d0e5d97
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating a 'PDF_SEO_LINK_FARM'. One of these URLs, 'https://ttraff.ru/pify?keyword=baghban+movie+title+song+free', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to potentially malicious content or a phishing attempt. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=baghban+movie+title+song+free
    • http://files.dermatologyequipmentstore.com/uploads/1/3/1/1/131164567/tiretafirazapum-lewafinuzebaxe.pdf
    • http://files.lquertportfolio.com/uploads/1/3/0/8/130814308/zuzibeditaxig.pdf
    • http://files.mayahabian.com/uploads/1/3/1/0/131070469/48190abbd4.pdf
    • https://cdn.shopify.com/s/files/1/0433/4501/9045/files/night_figurative_language_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/6737/5770/files/lovelepevizefitolobowe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2043/5112/files/software_project_estimation_document_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/4842/5889/files/91192017080.pdf
    • https://cdn.shopify.com/s/files/1/0433/4718/1718/files/beletemipekewowadafis.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/mugodaxu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1401/9496/files/firedojet.pdf
    • https://cdn.shopify.com/s/files/1/0436/6372/0613/files/demonstrative_pronouns_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/8777/4374/files/how_to_read_balance_sheet_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0434/8923/1000/files/31917210411.pdf
    • https://cdn.shopify.com/s/files/1/0434/9358/9142/files/wizipipabajenefise.pdf
    • https://cdn.shopify.com/s/files/1/0431/0492/7905/files/28147457529.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1607/files/waveposa.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_off0000924f.bin
b9dbac6d85a9c21d64b1e57e658e7a1605345eeb8557f7e462c43af5f30e7135
pdf-font-stream PDF embedded font (sfnt) at offset 0x924F 5432 bytes
font_01_sfnt_off0000a49e.bin
f216f4e02616d89f5d885c0d15fedff270f32ae23c435583aa80c901c614b8b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xA49E 15120 bytes