Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c11bbd79b7d76e…

MALICIOUS

PDF

41.3 KB Created: 2020-08-10 10:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84351704f4daa2d4276397afa1d16167 SHA-1: 0d32c43f94c6eb13c0c6395a534f99b578e6691b SHA-256: 02c11bbd79b7d76ef38250644ea31676014b649c5d147baa676369ea6c9a39a2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier and contains numerous embedded links. One of these links, https://ttraff.ru/pify?keyword=pathogenesis+of+recurrent+aphthous+stomatitis+pdf, points to known malicious redirector infrastructure. The document appears to be a link farm designed to direct users to potentially harmful websites, masquerading as academic or informational content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=pathogenesis+of+recurrent+aphthous+stomatitis+pdf
    • http://files.gloriousbibleinternational.com/uploads/1/3/1/3/131398008/7083321.pdf
    • http://bated.re-ventum.com/uploads/1/3/1/4/131407995/kazef.pdf
    • http://files.highclasswhoopass.com/uploads/1/3/1/6/131636941/4606565.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/1409/2960/files/google_drive_symlink.pdf
    • https://cdn.shopify.com/s/files/1/0436/4717/2768/files/mefalekulagajivoguzolo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5649/5769/files/49452937996.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0610/files/guide_to_intelligent_data_analysis_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8680/7201/files/88986909603.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1706/files/93233849833.pdf
    • https://cdn.shopify.com/s/files/1/0431/9612/1248/files/capacitive_humidity_sensor.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/dermatitis_seborreica_y_alopecia.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6315/files/toretokadumiwefabefeta.pdf
    • https://cdn.shopify.com/s/files/1/0433/6851/3686/files/nikoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/1701/8267/files/image_line_sign_up.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062bd.bin
7c78bfd1c8289edeaceb86f9cb61c966bcb892df7e85cf8a8d3bdeb8fa58991c
pdf-font-stream PDF embedded font (sfnt) at offset 0x62BD 5540 bytes
font_01_sfnt_off0000756f.bin
239315971851d57e8547c46a0a40d7df6abe3bc8f58ae7910de15a106069c4b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x756F 10172 bytes