Malicious PDF — malware analysis report

Static analysis result for SHA-256 aecad062b3ed0983…

MALICIOUS

PDF

57.9 KB Created: 2020-08-19 11:25:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f73b67eead2d3b7757f380d3b94b28b SHA-1: ad6908dce575d3be8077775b56c9135830b9df6a SHA-256: aecad062b3ed0983521f83981cd77844f3d73ec30509ccb71404d968d96d13dd
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is also present in the document body. It also fires for a PDF link farm and a social engineering lure for browser updates. The document provides instructions for a password-protected archive, suggesting a multi-stage attack. The primary attack pattern involves a deceptive link disguised as a free antivirus download.

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.com/pify?keyword=360+antivirus+free++for+laptop
    • http://files.alare.net/uploads/1/3/0/8/130874278/gawotitarebawaluna.pdf
    • http://files.islandqueenproductions.com/uploads/1/3/1/4/131453989/puxonimevewu_norun.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4214/files/semupalobarobofigosegoru.pdf
    • https://cdn.shopify.com/s/files/1/0433/1916/5086/files/polid.pdf
    • https://cdn.shopify.com/s/files/1/0436/1817/3086/files/82498836372.pdf
    • https://cdn.shopify.com/s/files/1/0434/2002/4989/files/nfhs_basketball_rules_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/5935/5558/files/23385367578.pdf
    • https://cdn.shopify.com/s/files/1/0440/2076/0741/files/pokemon_blue_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/3542/5944/files/dafolurakanamevusapok.pdf
    • https://cdn.shopify.com/s/files/1/0436/1935/2739/files/elasticity_and_anelasticity_of_metals_zener.pdf
    • https://cdn.shopify.com/s/files/1/0437/3187/8049/files/circle_theorems_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0452/5621/2640/files/brief_calculus_and_its_applications_13th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/1341/3786/files/95894397052.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/atividades_do_mei_2020.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_off0000a631.bin
9dfe40c4ff9a046b8300a397d89d4017fd32960673ab6b4aae1a2ead6da31ba3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA631 5320 bytes
font_01_sfnt_off0000b850.bin
cc86872dcff51ec5670d5b8cda331eed95cf74403c456e6b269b094d0d1da2bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xB850 10024 bytes