Malicious PDF — malware analysis report

Static analysis result for SHA-256 81e61ec61393a60a…

MALICIOUS

PDF

44.3 KB Created: 2020-08-15 02:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f2995f6ff45a2d5be8a5d94cf3e50d5 SHA-1: f44a0d64f1b8f2132447e8ebb4d7d876a9ccb115 SHA-256: 81e61ec61393a60a1da2e9fb04d13735aa409e2c994eba77d603a10fb1f59453
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to a '2019 calendar template' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a link to malicious infrastructure.

Heuristics 3

  • 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.
  • 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=2019+calendar+template+week+starting+monday
    • http://kegusare.flotography.org/uploads/1/3/1/3/131383483/5da3c.pdf
    • https://cdn.shopify.com/s/files/1/0441/3744/7576/files/41450829189.pdf
    • https://cdn.shopify.com/s/files/1/0432/4088/2340/files/modern_physics_randy_harris.pdf
    • https://cdn.shopify.com/s/files/1/0430/6078/9409/files/30285491449.pdf
    • https://cdn.shopify.com/s/files/1/0432/7168/4252/files/sedobakawuvubipezaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/6968/6431/files/katepilodezoxenurivelolaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4498/6262/files/factorio_color_command.pdf
    • https://cdn.shopify.com/s/files/1/0434/6462/2242/files/97667267862.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/rezab.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4498/files/xivavipofititux.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/7851154578.pdf
    • https://cdn.shopify.com/s/files/1/0437/2175/2731/files/22470645162.pdf
    • https://cdn.shopify.com/s/files/1/0431/2442/4870/files/bedutavekibok.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005db3.bin
b7e7920fadba5680ed3083284f26e0f0b20ffd33bbc557e3904bee728908f30a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB3 5824 bytes
font_01_sfnt_off00007179.bin
8513e5f1b6e294683bca149062691f7a7f7acc45e37a026564f7ffa5befd8786		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7179 10772 bytes
font_02_sfnt_off00009610.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9610 4324 bytes

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