Malicious PDF — malware analysis report

Static analysis result for SHA-256 c643a41919fe0d88…

MALICIOUS

PDF

44.2 KB Created: 2020-08-22 23:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4f1f018d71d21e51afe7aefff69f4c3 SHA-1: fb9bc440d0befe67a78e1f606eaa167d4f7f35fe SHA-256: c643a41919fe0d88bf16a3a307bacee6c927b4b9ef4b9af37d7a4dc98d2c098c
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=super+vpn+proxy+master+app'. The document body, though heavily obfuscated, contains this URL and text suggesting a 'Super vpn proxy master app' lure. This indicates a social engineering attempt to trick the user into clicking the malicious link, likely for credential theft or malware delivery. The presence of a PDF link farm further supports a malicious intent to distribute links.

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.cc/pify?keyword=super+vpn+proxy+master+app
    • http://jixosak.kansascitywriters.com/uploads/1/3/0/7/130738706/8241048.pdf
    • http://files.japhotos.me/uploads/1/3/0/9/130969346/91b06dffa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8961/7311/files/pixepuduwobuzimavi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2204/1767/files/nipawugudokami.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8280/files/20158924631.pdf
    • https://cdn.shopify.com/s/files/1/0440/5726/4280/files/jelijoxoketis.pdf
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/lifimu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/action_research_in_education_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0440/5755/9190/files/puxelapugepinafitabizax.pdf
    • https://cdn.shopify.com/s/files/1/0436/3046/1081/files/devosexaketup.pdf
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/18762236065.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/gemebugizasofikofu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/65154643044.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_off00006fbd.bin
833c38e0aced3b84a2ee14a216b0da3ed4201a4fd30eb9c601d64c7270d56fa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBD 5268 bytes
font_01_sfnt_off0000819b.bin
15ed46c8bdcf553a0ef9fc01e9b3078c7fbdc918fb59fadd54f7898b67d1d4ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x819B 10100 bytes

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