Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3957431a4ba4c6…

MALICIOUS

PDF

52.6 KB Created: 2020-08-13 21:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7561b39baabeaac9400be6331ed3fe18 SHA-1: 2e48488c3406dc2d8c3321535132e4c0725df721 SHA-256: 2f3957431a4ba4c66db4d1455a3c599e4131250f38af1adb2510f41a712b3073
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to ttraff.ru, which is also listed as an IOC. Additionally, the document body and heuristics indicate a social engineering lure to install a browser extension or view content, common for credential theft or malware installation. The PDF also hosts a link farm, suggesting an attempt to manipulate search engine results.

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=free+bootstrap+login+templates
    • http://files.arieschainmailandleather.org/uploads/1/3/0/9/130969686/govijiwewo.pdf
    • http://files.ivoryemily.com/uploads/1/3/2/3/132303407/1929298.pdf
    • http://zejonusas.danielmckeon.net/uploads/1/3/1/4/131454440/gepidiwenidef.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8239/files/biblioteca_online_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6161/files/44216862073.pdf
    • https://cdn.shopify.com/s/files/1/0437/8093/1742/files/xeduzukegewogala.pdf
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/bakezafozimekusakigut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9927/files/veponexumanun.pdf
    • https://cdn.shopify.com/s/files/1/0432/8652/8155/files/futovi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2063/9646/files/xipesegewifobike.pdf
    • https://cdn.shopify.com/s/files/1/0437/3394/2423/files/57922162494.pdf
    • https://cdn.shopify.com/s/files/1/0440/2744/5413/files/deriniguzevudi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7149/5574/files/geographical_information_systems_in_archaeology.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0815/files/20402318536.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/list_of_architecture_colleges_in_pune.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/63791979015.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_off00008d96.bin
6fea70884df34df18f75e100fee16f0bbbbf01cb157c00f2935bdb6abafb7462
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D96 5236 bytes
font_01_sfnt_off00009f48.bin
afffdaa0b9d60a921161a413a2f60135c9f7edef801524e254bc12175917b2ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F48 11012 bytes