Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d48855b8e7f0c08…

MALICIOUS

PDF

44.0 KB Created: 2020-08-22 06:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1f028a15e42367d841a26c195d9df94 SHA-1: 9a939f3fe71dd67b85d830991a2cc54a587b43a0 SHA-256: 3d48855b8e7f0c0811905d515f93b2356dfb98c85a622852b553f94d80b98b4a
160 Risk Score

Malware Insights

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

The PDF file contains a lure suggesting it's a compressed emulator download, but it embeds links to known malicious redirector infrastructure. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates a social-engineering tactic to trick users into installing software or extensions. The primary malicious URL identified is ttraff.ru, which is used to redirect users to potentially harmful content.

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=emulator+android+for+pc+highly+compressed
    • http://files.chennaishiayouth.com/uploads/1/3/2/7/132741352/16a15.pdf
    • http://files.wolffwords.com/uploads/1/3/1/3/131379815/3b897894c9f7d9.pdf
    • https://cdn.shopify.com/s/files/1/0428/9950/5311/files/54182238079.pdf
    • https://cdn.shopify.com/s/files/1/0440/6080/3237/files/hallelujah_trumpet_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/8185/0268/files/illustrated_course_guide_microsoft_excel_2020_advanced.pdf
    • https://cdn.shopify.com/s/files/1/0435/9792/2461/files/antimicrobial_activity_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9574/files/62357467707.pdf
    • https://cdn.shopify.com/s/files/1/0429/6998/9279/files/tewopikafotuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0422/files/61361642075.pdf
    • https://cdn.shopify.com/s/files/1/0439/1321/6168/files/thunder_egg_stardew_valley.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8319/files/cnn_female_sports_reporters.pdf
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/notting_hill_carnival_map.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_off00006d36.bin
6e1403e04a3599f743cc77868e97693e7d71391a5a84ece86b248b5a86dc294f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D36 5628 bytes
font_01_sfnt_off00008035.bin
48f36dd09f9255d030373d457f68ec05802388a063b0d554f0281bdca5814052		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8035 10196 bytes

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