Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a12792dc8f200ae…

MALICIOUS

PDF

145.8 KB Created: 2020-07-30 20:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 847d24b3b94a1bc665ac273d7af9c2d7 SHA-1: e17654f2fceb518448dfb821fc591ede574189ea SHA-256: 3a12792dc8f200ae980f2fc68a26c1f7924d2d48e468c6043a4653a41a804e72
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.ru/pify?keyword=medical+terminology+for+dummies+pdf+free', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'medical terminology for dummies pdf free', suggesting a lure to trick users into clicking the malicious links.

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=medical+terminology+for+dummies+pdf+free
    • http://files.joewilford.com/uploads/1/3/0/7/130775922/5981759.pdf
    • http://files.tenupministries.org/uploads/1/3/0/7/130776366/6827090.pdf
    • http://files.caryapexyouthchoir.org/uploads/1/3/1/4/131408172/1327135.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89120948070.pdf
    • https://cdn.shopify.com/s/files/1/0437/0527/0437/files/95285804797.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/45553356644.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0752/files/85760711733.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/sedobewag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.pdf
    • https://cdn.shopify.com/s/files/1/0430/0213/4681/files/feliturezesujezafavowuzad.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8617/files/87083693605.pdf
    • https://cdn.shopify.com/s/files/1/0428/8223/6583/files/xuvubutiwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/xukimuriwiguwuretimova.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001eb58.bin
ae534f0fb67e7bf73cc9ce4a4ab53376902b8662b7ecb7fa5a083151bfe5ed64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB58 5464 bytes
font_01_sfnt_off0001fde1.bin
da03775642c2f75b5fb5e831222d505a7011824542f035271bb39c0808159656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FDE1 12076 bytes
font_02_sfnt_off00022496.bin
d8a1a34de14a7b8fce5e51635835121d353d188f9ac9ce1e11538509fd4c5cdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22496 16060 bytes

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