Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa61d0cbecef896b…

MALICIOUS

PDF

41.0 KB Created: 2020-08-02 11:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e5a0b072a8468c471db855d23e2c9c5 SHA-1: 1a98963ec21eb3b1bcc7fc4a45109504031e90f3 SHA-256: fa61d0cbecef896b1f49be460bb1379cab73170940ba867846c084bb90601a52
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, with the primary redirector URL being https://ttraff.ru/pify?keyword=sort+values+pandas. This indicates a likely SEO link farm or a mechanism to distribute further malicious content. The heuristic firings confirm the presence of malicious redirector links and a link farm within the PDF structure. No scripts were extracted from this sample.

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=sort+values+pandas
    • http://files.mariomanzini.com/uploads/1/3/1/4/131438353/af7fcc8637b01.pdf
    • http://files.wrprc.org/uploads/1/3/0/7/130738889/3309091.pdf
    • http://files.vonsmartexercise.com/uploads/1/3/2/7/132740361/d4d93eb8b44af1.pdf
    • https://cdn.shopify.com/s/files/1/0434/8854/2872/files/segiwukevenopu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6199/1829/files/ziwir.pdf
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/revub.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/zokar.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/7286585321.pdf
    • https://cdn.shopify.com/s/files/1/0441/1126/5944/files/50769159064.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/bupiva.pdf
    • https://cdn.shopify.com/s/files/1/0432/7555/0873/files/principles_of_macroeconomics_mankiw_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/44368609931.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0057/files/29945039784.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1357/files/fibuvinamuvexiwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/82421224328.pdf
    • https://cdn.shopify.com/s/files/1/0436/9291/6886/files/liwanej.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_off00006368.bin
26f3caf3212ff36d00b16b5634f7ee043eaba1da2ffcbbc5447cfb5f55047025		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6368 5116 bytes
font_01_sfnt_off000074e4.bin
ec38e415b30d2b4e0293b23180098f2d14609d6d2a5ed30464ebebfc96c4e494		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E4 10100 bytes

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