Malicious PDF — malware analysis report

Static analysis result for SHA-256 925843612fbd0fa2…

MALICIOUS

PDF

41.4 KB Created: 2020-08-07 08:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c24756a3d9d2f970a4a963e68c822e4 SHA-1: 1afbfed0dbb790c3bbdb87ac26f65d9b2d00c7b1 SHA-256: 925843612fbd0fa207c058d899add71886431b0e990f85e5a027d29f1a7f65a0
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. This suggests a link farm or SEO poisoning tactic designed to lure users to a malicious site. No scripts were extracted, and the document body is heavily obfuscated, 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.cc/pify?keyword=anemia+ferropenica+embarazo+pdf
    • http://files.valeriecreane.com/uploads/1/3/1/4/131406060/fodikorazuradoxobe.pdf
    • http://files.classnelson.com/uploads/1/3/1/4/131483138/323584.pdf
    • http://files.thienpont-korosi.com/uploads/1/3/1/6/131606343/jutoxekane_tudokupigo.pdf
    • https://cdn.shopify.com/s/files/1/0440/4995/7029/files/jadajofogazonosufovugaza.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/wapidusibogowojujoko.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/mopiwavobunezojosuno.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6565103434.pdf
    • https://cdn.shopify.com/s/files/1/0432/0998/2107/files/44512900707.pdf
    • https://cdn.shopify.com/s/files/1/0433/4501/9035/files/miwoxexodilebe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/welulezujesugawarisozuza.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/25893023117.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/rulezabudavuxisemot.pdf
    • https://cdn.shopify.com/s/files/1/0431/6469/6738/files/demelazepiduviwunaf.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_off000064b6.bin
9eb933dbbdc647f77061943dd61bbe21af8e4aaa84031ee010dd2e6c5ce14b7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B6 5268 bytes
font_01_sfnt_off0000768e.bin
8c08d116a3ac1f2b7131cfa36902115b86d9aceb85f4e1a8eabef30f7c783129		 pdf-font-stream PDF embedded font (sfnt) at offset 0x768E 10068 bytes

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