Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ced2ac36301e5c…

MALICIOUS

PDF

40.3 KB Created: 2020-08-06 09:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8132454526b60db1d9888385876c776f SHA-1: bf2aa76066b628df7b0687ba63b71bb6116be4c9 SHA-256: a0ced2ac36301e5c93c03ec153d5c5e4024d97b6d66fc8f5c01e0aa8e595448b
120 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a string that appears to be a lure for an 'Excel data analysis course pdf'. The primary malicious IOC is the redirector URL, which is likely used to host further stages of an attack.

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=excel+data+analysis+course+pdf
    • http://files.lakeodessaarts.com/uploads/1/3/0/7/130738892/8701533.pdf
    • http://files.jennifercaraluzzi.com/uploads/1/3/2/6/132695662/1f2547c6c13.pdf
    • http://files.hccflmetz.com/uploads/1/3/1/8/131856050/xolelibalumifapeko.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2102/files/17365387056.pdf
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/95904959822.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1948/files/list_of_capitals_of_countries.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/vulamonivawabovijasisipig.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/mokomufola.pdf
    • https://cdn.shopify.com/s/files/1/0428/8672/5799/files/bahtsul_masail_sidogiri.pdf
    • https://cdn.shopify.com/s/files/1/0432/0559/1200/files/rewubuwapiba.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/fotekibevakoxosotuju.pdf
    • https://cdn.shopify.com/s/files/1/0431/1462/7234/files/memibole.pdf
    • https://cdn.shopify.com/s/files/1/0431/8468/5220/files/73410362888.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/ladexisileno.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46946939033.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_off00005ec7.bin
5fe997ff6eeab6f6aa9c65b0407a72a8258db6c3646348711a02dc6d508201be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC7 5276 bytes
font_01_sfnt_off000070dc.bin
c0e67e31f70a4f4e57553d277d080a144c36a9b11423dad27069283ddbea88f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70DC 10512 bytes

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