Malicious PDF — malware analysis report

Static analysis result for SHA-256 a115d65ef1366954…

MALICIOUS

PDF

42.8 KB Created: 2020-08-25 22:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5295d8a66c229e08ade0c9036e459956 SHA-1: 90154a55e6cf56d3bd8e9256c86b41352e104604 SHA-256: a115d65ef1366954795dab6b2f7b62ebb7be08d8d27a28172dc39612f59c0d91
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=libros+de+la+segunda+guerra+mundial'. This URL is part of a link farm designed to attract users searching for specific book titles, likely as a lure. The document body, though heavily corrupted, contains the same book title and a URL, reinforcing the lure. The PDF also contains numerous links to Shopify-hosted PDFs, some of which are benign, but the primary redirector is malicious.

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=libros+de+la+segunda+guerra+mundial
    • http://zinifaru.omalleyfoundation.com/uploads/1/3/2/8/132814343/pekiza.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2791/files/fusamunepibug.pdf
    • https://cdn.shopify.com/s/files/1/0434/8621/6352/files/50288546540.pdf
    • https://cdn.shopify.com/s/files/1/0464/0279/7723/files/13987564734.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0647/files/online_timer_bomb_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/xojunigofolipejix.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/mubuzabanemi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2869/2643/files/lafexinavuloj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/gofanubejax.pdf
    • https://cdn.shopify.com/s/files/1/0437/7837/5829/files/kogamekipobenologasataf.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_off000068e0.bin
a64d76d5af44df0e79fba02f2aa8999cda7d7a699d1973eb8a3463f6e6a4b2a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E0 5228 bytes
font_01_sfnt_off00007a87.bin
fc77ed6b9ff22a31cb0e6c05eb80d3455711466d14e03a63a9d506c0a0cbbef4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A87 11248 bytes

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