Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cdaf538a1a76b24…

MALICIOUS

PDF

39.0 KB Created: 2020-08-30 10:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 619a3c1a6cbc8ad0579f4b60cee1a7af SHA-1: d06a4f0c61c5949c63ecbde7e8a2bfa8dfc1eaaa SHA-256: 7cdaf538a1a76b242dcbb6d3ddfe620da8ce0576019f9119e2048d49a8ee5d62
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'persuasive speech powerpoint examples' and the malicious URL, suggesting a social engineering lure. The presence of multiple external PDF links also indicates a link farm, likely for SEO poisoning or to distribute further malicious content.

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=persuasive+speech+powerpoint+examples
    • https://static.usrfiles.com/ugd/79cb75_73b2e22ac26e42119ce91b914caf9467.pdf
    • https://static.usrfiles.com/ugd/b8c837_3613a9d2513a4ce6bbefef911945bafe.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b7f122c35bf4c06913c209b901232f2.pdf
    • https://static.usrfiles.com/ugd/ac51ce_a9810be2079e41628150af63fc70fd54.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b43c685aaea403bb1a112fa16eaf3c1.pdf
    • https://static.usrfiles.com/ugd/87a178_3f5e01bb36bf4867a25d0b0e7b81e2a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_7430bd5b64ba4af181249ef819609fc0.pdf
    • https://cdn.shopify.com/s/files/1/0435/8737/1167/files/ketinimemujodivoliba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lavatorumagenikezelun.pdf
    • https://static.usrfiles.com/ugd/b8c837_c29ae1bceaaa479c8e4ea670a18e14fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_16479d6eafdc437fa583bb2210179fda.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_off00005b80.bin
ae8cd80586916178c002b50257c87f679411082b6ab3001966e7d358a64ae0a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B80 5392 bytes
font_01_sfnt_off00006dbc.bin
b3db742e765673ac650a883173d501599dd847dc36543e999c33616d2b7b2b28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBC 9960 bytes

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