Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12657b120f573be…

MALICIOUS

PDF

38.9 KB Created: 2020-08-16 20:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a40f19ebf12ce19a5a2df6e492ff82b SHA-1: 3a18dd474a4ea5be24eabc5ebdfae6a5a0502f4c SHA-256: f12657b120f573be01445ee1f1b2f5a29c871b909a8d5a8db14fd8ac9a5d9203
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for 'general annuities pdf'. The PDF also contains a link farm heuristic, indicating a large number of external links, many hosted on Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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=general+annuities+pdf
    • http://files.ruleyscanecorsos.com/uploads/1/3/1/4/131406507/wugenigonove.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6953/files/11393096337.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3468/files/fovonanovosonopanenexon.pdf
    • https://cdn.shopify.com/s/files/1/0429/2149/2643/files/angular_8_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1371/7662/files/75504264419.pdf
    • https://cdn.shopify.com/s/files/1/0432/2636/6111/files/pabar.pdf
    • https://cdn.shopify.com/s/files/1/0430/3824/5017/files/funciones_trigonometricas_de_angulos_complementarios_y_suplementarios.pdf
    • https://cdn.shopify.com/s/files/1/0437/3138/6529/files/kugunozesegasapapagi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2903/5158/files/mame_chd_files.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/vabavaxaxusaselixagife.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9158/files/veritext_court_reporting_miami.pdf
    • https://cdn.shopify.com/s/files/1/0433/2873/3352/files/11995091747.pdf
    • https://cdn.shopify.com/s/files/1/0431/6839/9524/files/cameroon_anglophone_crisis.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_off00005bb1.bin
581a8c3c6d48b1d5080c7dc00957ed2671d8781fb13d8ce3b39de65c5590d772		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB1 5064 bytes
font_01_sfnt_off00006cfd.bin
c2318d22468f39258d5189d9a625bc2b082f2300133e6dd563f9d25b49770530		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFD 10116 bytes

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