Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0a826299e67dd8…

MALICIOUS

PDF

39.8 KB Created: 2020-08-30 12:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b1002f997eb806196b9ce41c9a30104 SHA-1: b20f13a77b8c84ec868050c56bfd89c309538784 SHA-256: 7c0a826299e67dd875964fe75aae5b686d0334cd8c85c72437297eff8d10a2f3
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with 28 links pointing to various PDF files hosted on Shopify. One of these links, https://ttraff.cc/wix?keyword=carlos+baute+colgado+en+tus+manos, is identified as a malicious redirector. The document body contains garbled text but also includes the malicious redirector URL and several benign Shopify URLs, suggesting an attempt to disguise malicious activity within a large number of links. The primary intent appears to be directing users to malicious infrastructure through a link farm.

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.cc/wix?keyword=carlos+baute+colgado+en+tus+manos
    • https://cdn.shopify.com/s/files/1/0434/9349/0838/files/dalak.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/guantanamera_ukulele_fingerstyle.pdf
    • https://cdn.shopify.com/s/files/1/0441/0903/7720/files/becoming_supernatural_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9930/8700/files/short_history_of_ottoman_empire.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/marathi_kadambari_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4487/2085/files/32760647642.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/pat_smear_net_worth.pdf
    • https://cdn.shopify.com/s/files/1/0429/1071/1971/files/domanek.pdf
    • https://cdn.shopify.com/s/files/1/0431/5093/4173/files/list_all_worksheets_in_a_workbook_excel.pdf
    • https://static.usrfiles.com/ugd/963627_31f6c2e966404137904551f3b5ead53c.pdf
    • https://static.usrfiles.com/ugd/dc98cc_211c3e9fcfbd4a6b9af226b42f07da5e.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_2038d0f0c7a24e45b3f39814a0b504bc.pdf
    • https://static.usrfiles.com/ugd/e2b09b_ed0811f93e5949e998baf53edf524a82.pdf
    • https://static.usrfiles.com/ugd/b8c837_625ec62b2ece41dda5da1f035a410d06.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_off00005d74.bin
7b3c7ff23a480aff11abfb5cded9d3c8eeb4f7f4c829d96914435fe249d0562a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D74 5304 bytes
font_01_sfnt_off00006f5c.bin
646f88dfc52c1912ee159e21b0c134fa05bb6ea29c6fcffb34c8a1b81aba6ec9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5C 10800 bytes

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