Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1610d597b8adf2…

MALICIOUS

PDF

42.7 KB Created: 2020-08-21 18:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4ea81d3061a33c654a423f858ef269c SHA-1: ad16136e9b697f6759d9b789b5e7f49416e34e84 SHA-256: 3c1610d597b8adf2b9e942517bc67e8a5faf27e04ea74b65cbe7bd117b8f240a
150 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, specifically pointing to a URL designed to lure users with the promise of free web hosting templates. This URL, 'https://ttraff.cc/pify?keyword=web+hosting+joomla+templates+free', is the primary indicator of malicious intent. The document also contains a large number of embedded links, many hosted on Shopify, which is indicative of a link farm used for SEO manipulation or to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=web+hosting+joomla+templates+free
    • http://files.greenaccountingservices.us/uploads/1/3/1/4/131454114/efd0ff7ce2a675.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9493/files/60872143797.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/dojuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/nuwugotowodapawixavunofiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/powotoviwizefume.pdf
    • https://cdn.shopify.com/s/files/1/0437/5370/1525/files/zinilakotuduv.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/17769612915.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/27382993873.pdf
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/kejosa.pdf
    • https://cdn.shopify.com/s/files/1/0439/0476/2011/files/69699655673.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/91786299497.pdf
    • https://cdn.shopify.com/s/files/1/0432/2384/2983/files/mv_boomerang_wanna_one_wapka.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_off00006740.bin
28f59eef3d44b52b1c00bb8f45c38a700eeea0117ce0d0be540c871719fb326d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6740 5544 bytes
font_01_sfnt_off000079fc.bin
dc7101151776daa3581c18db83d89ecdef62eb88ad368a27c6e24e7f262b1036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FC 10624 bytes

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