Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1243ec4ceb6a6da…

MALICIOUS

PDF

45.8 KB Created: 2020-08-23 15:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c5fc9e11b3493be6d5bdec19e221cc9 SHA-1: 3054b1fa79ff0505e5179bfbd3862bc52c1d2988 SHA-256: c1243ec4ceb6a6da0bc18c0e9c940de29b91e9d3a4aaea2ee75a83106cfbaca2
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=rental+application+form+reason+for+leaving'. This URL is embedded within the document's body, disguised as a rental application form. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The primary malicious URL is the most significant IOC.

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=rental+application+form+reason+for+leaving
    • http://pifuris.serenitiesnow.com/uploads/1/3/2/3/132303382/sokoz_pixipadasago_dezizoxelad.pdf
    • http://files.coinsmakecents.com/uploads/1/3/0/7/130739174/49fa8e.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5126/files/30218835055.pdf
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/jenogiro.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/57518697587.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/central_science_13th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/bastar_university_ma_time_table_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/5196/4830/files/94195624387.pdf
    • https://cdn.shopify.com/s/files/1/0438/7418/9480/files/satefajin.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/82780406778.pdf
    • https://cdn.shopify.com/s/files/1/0434/7409/2198/files/endemic_epidemic_pandemic.pdf
    • https://cdn.shopify.com/s/files/1/0439/8238/9406/files/34719607646.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9970/files/95222831097.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_off00007476.bin
5af3a9a2b8f5f78b2f0526b8fa9e59e3a08b6df917761cd28ceaac8f0c776674		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7476 5404 bytes
font_01_sfnt_off000086cc.bin
6c7962d1660944a93cb9b80d2a9372007f4bc620777f11f82681fe61dfb66318		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86CC 10288 bytes

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