Malicious PDF — malware analysis report

Static analysis result for SHA-256 d703790634d9f8eb…

MALICIOUS

PDF

39.2 KB Created: 2020-08-22 18:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62fa4461c85ba8ba946c82738ac1de3b SHA-1: b65687b9d8397567f95780f6fb89ca60ba48fe30 SHA-256: d703790634d9f8eb2eda55a8e3dc78fc23eb97df3ea04fc4fdad18039b84ef6c
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=spreadsheet+vs+excel'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to lure users to malicious sites via these 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.com/pify?keyword=spreadsheet+vs+excel
    • http://files.100alicestories.com.au/uploads/1/3/1/6/131606094/kugegixib.pdf
    • http://vuwikoros.westburnsvalleysolar.com/uploads/1/3/1/4/131483109/a0ba1bf3bd0dfc5.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kaxoku.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/556087451.pdf
    • https://cdn.shopify.com/s/files/1/0439/3995/4856/files/steven_s_skiena_the_algorithm_design_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1045/files/47448947539.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/jolomokeruxejuvolix.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/westworld_s01e08_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1592/files/cyrano_de_bergerac_hachette.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3117/files/pofafijiwisakadef.pdf
    • https://cdn.shopify.com/s/files/1/0428/4458/6140/files/9227585362.pdf
    • https://cdn.shopify.com/s/files/1/0429/5432/6179/files/65957654920.pdf
    • https://cdn.shopify.com/s/files/1/0440/7338/6136/files/62406987951.pdf
    • https://cdn.shopify.com/s/files/1/0459/5443/3183/files/banuleluwotovasan.pdf
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/zafegorudavu.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_off00005cb8.bin
157593d282d85bb415dbd740309b923a10f1a5577d90d2c75c9ad6d56eb46ff3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB8 5392 bytes
font_01_sfnt_off00006f0b.bin
07a74c4e31a83d0b2052dad9d2455c0a6ee23a2a852c4d7abb3bfa3af125aaf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0B 9780 bytes

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