Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb15778845753c8…

MALICIOUS

PDF

43.2 KB Created: 2020-08-22 19:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4154b977d02b57f1200a9bf5e72a446e SHA-1: 542103fb0aadf73578ba72c1ae4fa7a7ce48bde9 SHA-256: 2eb15778845753c88f7d12201e56b28ee2a892b31a5f54b45736be1b413701ed
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 links, with a critical heuristic firing for a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=the+algorithm+design+manual+pdfdrive', points to a known malicious redirector. The document body, though heavily obfuscated, contains references to this malicious URL and other benign-looking PDF links, suggesting a social engineering attempt to direct users to malicious content.

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=the+algorithm+design+manual+pdfdrive
    • http://files.nutritiousandnice.com/uploads/1/3/2/6/132695572/e9b15.pdf
    • http://files.kittyvera.com/uploads/1/3/0/7/130776147/sisizawubasizemu.pdf
    • http://files.italiancitizenshiptranslator.com/uploads/1/3/1/3/131381881/fapalinatemi-rokotukin-doluripat.pdf
    • http://files.az-gems.com/uploads/1/3/1/3/131384636/b4a1dd.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/ecological_theory_bronfenbrenner.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/git_bash_push_to_github.pdf
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/iti_admission_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/xadopisufasidojo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71409998288.pdf
    • https://cdn.shopify.com/s/files/1/0437/7991/5937/files/associao_de_geradores_exercicios_resolvidos.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/woxumopekafipupubel.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_off00005dc1.bin
d5d090ad3a9e595e09b6f2052ffe17ce99c24616b895a25e48642932e2a24b12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC1 5348 bytes
font_01_sfnt_off00006fcd.bin
d5179a01c7c8f05ce1116786a6a0bff92a37f43dcd529cf5eb0a8af2ad945b18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCD 10016 bytes
font_02_sfnt_off0000922f.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x922F 4324 bytes

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