Malicious PDF — malware analysis report

Static analysis result for SHA-256 21108b66021077b1…

MALICIOUS

PDF

47.5 KB Created: 2020-08-05 23:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7851c535e48e2fe88380dfe51e40c8c2 SHA-1: cd3c7eb026e55ed734bf8e8a5931bdb9ae590768 SHA-256: 21108b66021077b105823f4e90ae5051b8955b4407799e20eae9fac1254924ef
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=la+caida+del+muro+de+berlin+ensayo+pdf'. The document body, though heavily obfuscated, also contains this URL and other links to what appears to be a link farm hosted on Shopify. This suggests a phishing or malicious redirection attempt, likely to deliver a secondary payload or lead the user to a fraudulent site.

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=la+caida+del+muro+de+berlin+ensayo+pdf
    • http://files.villagepostmark.net/uploads/1/3/2/7/132740665/pezaw-xugiluzof.pdf
    • http://files.transformation4you.com/uploads/1/3/2/6/132681494/6992414.pdf
    • http://suzad.ppcomachining.com/uploads/1/3/0/8/130874359/9077974.pdf
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/pasogabigi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2091/8679/files/livro_nutrio_aplicada_e_alimentao_saudvel.pdf
    • https://cdn.shopify.com/s/files/1/0432/3855/5805/files/32062667272.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6273/files/nizanizoxukerepos.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/43344520975.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/lazawul.pdf
    • https://cdn.shopify.com/s/files/1/0433/7762/3194/files/nepefozodogigofos.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3404/files/36925903239.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/givigufulejawor.pdf
    • https://cdn.shopify.com/s/files/1/0428/6437/8022/files/89954240989.pdf
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/63411686760.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/2013_hyundai_elantra_owners_manual.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_off00006b90.bin
840037adeee705ea0df0abf72a73a7877578cf6f2a5db00617b6a37144625311		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B90 5284 bytes
font_01_sfnt_off00007d5d.bin
9a86c90658816acb4ab053523b2ccb0e59f958b105d3a10ad86a5566a5988713		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5D 10984 bytes
font_02_sfnt_off0000a130.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA130 4324 bytes

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