Malicious PDF — malware analysis report

Static analysis result for SHA-256 acef2b8092ad52de…

MALICIOUS

PDF

48.6 KB Created: 2020-08-23 14:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a0c1a61cd7e566d2f3876d45fec6099 SHA-1: 06ce076930c83a2eced2a9f83df0f3657cb71c43 SHA-256: acef2b8092ad52de8186c3c9faff8f0ec6eef840a18674e4372e2055a23c1562
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. The primary malicious link, https://ttraff.ru/pify?keyword=degrees+of+comparison+worksheets+for+kindergarten, is identified as a redirector to malicious infrastructure. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to potentially harmful content under the guise of educational material.

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=degrees+of+comparison+worksheets+for+kindergarten
    • http://xetar.lovelifeagain-lifecoachingmore.com/uploads/1/3/1/1/131163635/nesup.pdf
    • http://moneb.cartyfamily.org/uploads/1/3/0/7/130740558/titofiwelozadurej.pdf
    • https://cdn.shopify.com/s/files/1/0440/5955/8053/files/40010334352.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/7853806764.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/burger_king_gutscheine_2020_mai.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/12871828548.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/nipim.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9120/files/hypertension_guidelines_2018_aha.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/38810225405.pdf
    • https://cdn.shopify.com/s/files/1/0437/6133/6471/files/ganapati_atharvashirsha_sanskrit.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_off00007f68.bin
00cbaa730aceba7bf94a55bba1eacfb2b99588f01b391571edc8c56c00c480b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F68 5692 bytes
font_01_sfnt_off000092b5.bin
e0972a2dc3ecadd35edc03b62c4e698df8d42076e8febf094844791d63eaded3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92B5 10240 bytes

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