Malicious PDF — malware analysis report

Static analysis result for SHA-256 01030ba293b2ed70…

MALICIOUS

PDF

57.9 KB Created: 2020-08-19 17:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 966d518b5c880b02d0cc84fab51c7fb7 SHA-1: 67e981a6c3ea290ce1c6364525d981fee00ea3fc SHA-256: 01030ba293b2ed70313d2f69ca8b201a0fb6fd2e9de3ee36fff01966779ab6b5
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external links, including one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to lure users into clicking it. The ML classifier also strongly indicated maliciousness.

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=carl+jung+aion+pdf
    • http://borama.geooriginals.com/uploads/1/3/1/4/131453194/be28b.pdf
    • http://files.whobuiltthemoon.com/uploads/1/3/0/7/130739463/kamatapoxewezafefo.pdf
    • http://files.ogbf.org/uploads/1/3/0/7/130738951/ketilow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8938/6901/files/mavusawuwuxuzike.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/anexos_do_simples_nacional_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/8176/7841/files/top_android_games_with_controller_support.pdf
    • https://cdn.shopify.com/s/files/1/0440/8141/4296/files/3984970320.pdf
    • https://cdn.shopify.com/s/files/1/0434/2887/2341/files/bitdefender_free_windows_xp.pdf
    • https://cdn.shopify.com/s/files/1/0448/4333/5837/files/enescu_cantabile_et_presto.pdf
    • https://cdn.shopify.com/s/files/1/0463/1029/3669/files/manual_paper_bag_making_machine_video.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5626/files/effects_of_budget_deficit.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/managerial_accounting_mcqs_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/57482864835.pdf
    • https://cdn.shopify.com/s/files/1/0431/6259/9586/files/kotisupubizud.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_off0000a70a.bin
470f49568418b2405f2267878bc5f9333ad3fb7198593d5357b4c48b9e42ec56
pdf-font-stream PDF embedded font (sfnt) at offset 0xA70A 5012 bytes
font_01_sfnt_off0000b82f.bin
9427b2416a11db274f59dc5636fdd0ce74688d66cddacd334c0999ce140716a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xB82F 10160 bytes