Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf058cb5debaefb…

MALICIOUS

PDF

50.9 KB Created: 2020-08-11 19:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 621860ebfa7d912744dbfc65910a38e5 SHA-1: 98de592c69719e2cbbcaf6e79048425d699b598d SHA-256: fdf058cb5debaefbc4270f382ee5086fa9a162460bf04111d92b9b9b893e9cfb
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wb?keyword=how%20to%20toggle%20between%20worksheets%20in%20excel%20mac', suggesting a lure to trick users into clicking a malicious link. The presence of numerous other PDF links, many hosted on Shopify, further supports a link farm or redirection strategy. No scripts were extracted from this sample.

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/wb?keyword=how%20to%20toggle%20between%20worksheets%20in%20excel%20mac
    • http://files.rubend.com/uploads/1/3/1/3/131379042/a7bbed36.pdf
    • http://wepivurit.eloisekerr.co.uk/uploads/1/3/0/8/130813528/tusejupanurog.pdf
    • http://files.melepana.com/uploads/1/3/1/3/131384255/lanoxilejikefew-nazebavobisanan-gazoga-pufojaj.pdf
    • http://jiwetama.allyssasharpe.com/uploads/1/3/1/4/131438157/9255998.pdf
    • https://cdn.shopify.com/s/files/1/0438/8824/6936/files/the_bodybuilder_s_nutrition_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0655/files/58485448795.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/718_cayman_gt4.pdf
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/84775705665.pdf
    • https://cdn.shopify.com/s/files/1/0435/4048/0164/files/32955859667.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/79827096335.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/miranda_cosgrove_about_you_now.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/beamer_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2367/files/agile_product_management_with_scrum_roman_pichler.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/1268325923.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069e7.bin
0ace5ee0ff4a59644ccb57aa3535acac2bd12fc7c791af9d01eee5d9ed199082		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E7 5540 bytes
font_01_sfnt_off00007c9a.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9A 1800 bytes
font_02_sfnt_off00008527.bin
69436b83c5158fe5b245c080942cb4f10605c4d1d52d29836775bbe1b95b0c47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8527 10180 bytes
font_03_sfnt_off0000a832.bin
6f30d31ab53d325f4e3f08a53e883132ea92c501d32d7b77fa495aa04f83fc5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA832 16312 bytes

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