Malicious PDF — malware analysis report

Static analysis result for SHA-256 239a45fcfa0e4974…

MALICIOUS

PDF

41.6 KB Created: 2020-08-21 22:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a89123602e9f804861ba977f0ab9f93e SHA-1: 38681cf5e1d9c6c890b1912b7ac02824e408c596 SHA-256: 239a45fcfa0e4974f1fd92eebd67e2fd1372da7ebea41056ea062b0b2b4d1af9
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains this URL and other embedded URLs, suggesting a social engineering lure. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document likely prompts the user to install something, which, combined with the malicious redirect, points to a delivery mechanism for further compromise. No scripts were extracted from this sample.

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.
  • 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.ru/pify?keyword=bluetooth+module+datasheet
    • http://kubaw.justkeephoping.com/uploads/1/3/2/6/132695550/jolezugaxope_mewukatiwiko_gokudak.pdf
    • http://files.clydeaspevig.com/uploads/1/3/1/1/131164456/d86910b256bc.pdf
    • http://files.caitlinejonesauthor.com/uploads/1/3/1/4/131453494/pipibu-netotojaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44240048578.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6149/files/wotetijabaruveza.pdf
    • https://cdn.shopify.com/s/files/1/0437/3938/1912/files/definition_of_commencement.pdf
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/5_stages_of_grief_handout.pdf
    • https://cdn.shopify.com/s/files/1/0448/0447/2992/files/bedingungsstze_franzsisch.pdf
    • https://cdn.shopify.com/s/files/1/0431/2426/1026/files/91590341965.pdf
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/93722337343.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/qradar_vulnerability_manager_guide.pdf
    • https://cdn.shopify.com/s/files/1/0441/2178/4472/files/avatar_korra_episode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/functional_skills_english_level_2.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_off000061e4.bin
cb63a1747b1ff70b5b72c6725ce89bc3bd1423df2f9239b338f7694071479862
pdf-font-stream PDF embedded font (sfnt) at offset 0x61E4 5020 bytes
font_01_sfnt_off000072d2.bin
07fdfadf807520496bea67ce2db14fa3d5819753b27327f173f3014660d5c713
pdf-font-stream PDF embedded font (sfnt) at offset 0x72D2 12468 bytes