Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d777f265e53daf…

MALICIOUS

PDF

35.3 KB Created: 2020-08-13 23:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e71843485d6f841e226501226b886ae SHA-1: 963d9e33ff6b45fa39c6f6d0ce0477e28fb4e7d1 SHA-256: a3d777f265e53daf21c12fc1d79c59ec3c359c9767464eb834be7ffcd283e304
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=grammar+worksheet+enough+adjectives+vs+nouns', is identified as a malicious redirector. This suggests the document's purpose is to direct users to malicious infrastructure, likely for further exploitation or phishing.

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=grammar+worksheet+enough+adjectives+vs+nouns
    • http://didezur.schecktech.com/uploads/1/3/0/7/130739678/e350a.pdf
    • http://kipilomod.stwilliamparishwigan.org/uploads/1/3/1/3/131383548/dorolawarajetus_raziz.pdf
    • http://xuwale.falconssoftball.com/uploads/1/3/1/4/131411688/ninaveb-puviwubu-werilugepiti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/vepufuwak.pdf
    • https://cdn.shopify.com/s/files/1/0433/5121/2200/files/9553899261.pdf
    • https://cdn.shopify.com/s/files/1/0430/7674/7413/files/dugowibagulatazono.pdf
    • https://cdn.shopify.com/s/files/1/0437/4550/9537/files/bizumi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1032/5671/files/cnc_machine_tools_name.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2191/files/tofituma.pdf
    • https://cdn.shopify.com/s/files/1/0432/6778/4864/files/suwozotajilafe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7973/7237/files/jebomokosojukako.pdf
    • https://cdn.shopify.com/s/files/1/0449/9125/0590/files/tunukotafudubabekom.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/64619077146.pdf
    • https://cdn.shopify.com/s/files/1/0429/9636/7511/files/66440727612.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/munexe.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_off00004b1d.bin
05a0fddfec38ccdb9866095dfac34b5daf3dae06ad2b56b5886024e08ef0dc28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B1D 5644 bytes
font_01_sfnt_off00005e4f.bin
96e9dc1096904c944794fd69a79b0e9c441876857cb4c65f36c1de7f87fd7967		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4F 9820 bytes

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