Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ead038f7c592d7e…

MALICIOUS

PDF

54.3 KB Created: 2020-09-29 19:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4418899caff992128b2f95b8b59bedc2 SHA-1: 3f1e65892525da39cdad4198d6c8ba2719b98c1a SHA-256: 6ead038f7c592d7e93e8758ceb8886d031e190c868fed4ed0e7baddce03ed08d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://gettraff.ru/strik?keyword=introduction+%25C3%25A0+l%2527+agronomie+pdf In PDF document text
    • https://site-1037246.mozfiles.com/files/1037246/94970735472.pdfIn PDF document text
    • https://site-1036862.mozfiles.com/files/1036862/67143590194.pdfIn PDF document text
    • https://site-1036675.mozfiles.com/files/1036675/72169898404.pdfIn PDF document text
    • https://site-1036753.mozfiles.com/files/1036753/81232020303.pdfIn PDF document text
    • https://site-1036733.mozfiles.com/files/1036733/65416565639.pdfIn PDF document text
    • https://site-1036909.mozfiles.com/files/1036909/kuxopozepuparatalanumuzo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6508/9704/files/amana_commercial_microwave_clean_filter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/tisejadedunobukodukovenod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/cbr_test_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4009/3846/files/mpeg_2_playback_component.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0E0 5500 bytes
SHA-256: 5ed482a1d1c36198d5bde60fde5069baceef55a0f5fcd9b34c07d7ed43d33f4d
font_01_sfnt_off0000b2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FF 12688 bytes
SHA-256: 55d041f29ce0e7d5f07126381560736c7e550e95f250eeea92052e68e28a196c

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