Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4be1545d278ff3…

MALICIOUS

PDF

41.9 KB Created: 2020-08-02 22:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89073b4bc8d8ab64b9e5e062fe783384 SHA-1: 09c087e3c84e6eae48fff09ebb4047a811417e50 SHA-256: 1c4be1545d278ff35a5a62740c798ac70e1b2fb6221b5d236e8a0c0d1a40a8ef
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=airfoil+license+key'. Additionally, it exhibits a PDF link farm pattern, with many links pointing to Shopify domains, one of which is also listed as an IOC. The presence of a visual download button lure further supports the malicious intent of redirecting the user to a potentially harmful site.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=airfoil+license+key
    • http://files.shelterreform.org/uploads/1/3/1/4/131453109/65fe6415658d8.pdf
    • http://files.yogitreewellbeing.com/uploads/1/3/1/6/131636745/fotej.pdf
    • http://files.iamstronglikemom.com/uploads/1/3/1/3/131382092/jikekiv-gonimiv-gositoxego.pdf
    • https://cdn.shopify.com/s/files/1/0440/3855/3765/files/digital_design_frank_vahid.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/vitifunalodoratabawe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2155/0247/files/82093966514.pdf
    • https://cdn.shopify.com/s/files/1/0437/2224/4250/files/24289510372.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/ziriwovabovaduvelipilux.pdf
    • https://cdn.shopify.com/s/files/1/0437/7555/7793/files/1016648578.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/kawivitubanonulopusomiwuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/3319/7718/files/xabibarofonofa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9431/9009/files/28476597159.pdf
    • https://cdn.shopify.com/s/files/1/0433/5285/0586/files/99666592961.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7727/files/34002610353.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/85795647587.pdf
    • https://cdn.shopify.com/s/files/1/0429/1539/7788/files/79615926272.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3876/files/mubivugexasuwetulativete.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_off0000636f.bin
06389f42934c7f13de46654fca59bf2323724190612b899a3ec6a94a567dc663
pdf-font-stream PDF embedded font (sfnt) at offset 0x636F 4820 bytes
font_01_sfnt_off000073f7.bin
be35bc6bb6bd0adb7de8f4ef92d8fee384605c210d0ca514ffc34502f0d9470a
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F7 11996 bytes