Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ccd06ce1126521…

MALICIOUS

PDF

43.5 KB Created: 2020-08-14 18:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b88e213eb7b0de3092a8a769928d1d9 SHA-1: abf88a47407078897e994921152f2d981d33eec6 SHA-256: a3ccd06ce112652161bc38ff6fa827eb65dc5e578b3d0eff99fb111aab640a91
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=psychology+book+references+apa+format'. This URL is likely used to redirect users to a malicious site. The document also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the presence of the malicious redirector is the primary indicator of compromise.

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=psychology+book+references+apa+format
    • http://files.plumcreekownersassociation.com/uploads/1/3/0/7/130776037/fonefizusosufi_sejagid_kofiragowufuwu_zitulakitapefe.pdf
    • http://files.pavlicek-foto.com/uploads/1/3/0/9/130969565/sirejifora.pdf
    • http://files.posterworksgallery.com/uploads/1/3/2/7/132740623/606b5d2a5.pdf
    • https://cdn.shopify.com/s/files/1/0431/0925/3282/files/vepatugewapo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xanixiki.pdf
    • https://cdn.shopify.com/s/files/1/0436/9278/5818/files/aeneid_book_3.pdf
    • https://cdn.shopify.com/s/files/1/0435/0522/1784/files/bafilusexulakumupof.pdf
    • https://cdn.shopify.com/s/files/1/0429/4252/9695/files/44354673150.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89352644259.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/bessie_s_blues_bb.pdf
    • https://cdn.shopify.com/s/files/1/0434/7074/9849/files/cancer_de_cuello_uterino_introduccion.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/52575746633.pdf
    • https://cdn.shopify.com/s/files/1/0435/5221/1099/files/74109586312.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6351/files/11485053389.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/8046285455.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_off00006afe.bin
054c61eaf0d3ec067906f62c90107dd45390a3e27b57cdc5dac70bca8403838d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFE 5736 bytes
font_01_sfnt_off00007e56.bin
763f5d3b52a38522aa26dcfa7d51676adea9efb33c17d87260b54c0a5eed0310		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E56 10120 bytes

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