Malicious PDF — malware analysis report

Static analysis result for SHA-256 22398f148fa68a41…

MALICIOUS

PDF

41.5 KB Created: 2020-08-07 21:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be60fc639074bd7a60bfa464da1b3843 SHA-1: 39002de4f420d6e7f9d01c6473918211349e95a7 SHA-256: 22398f148fa68a4106b70cfb6e0673b6183d1ee4bd3269d5ecc932f4934edc3f
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=reactions+of+cycloalkanes+pdf'. This indicates the document's primary purpose is to redirect users to malicious content. The presence of a large number of external PDF links, many hosted on Shopify, further supports a link farm or SEO poisoning tactic to distribute the malicious redirector. No scripts were extracted, and the document body is heavily obfuscated.

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=reactions+of+cycloalkanes+pdf
    • http://files.nobyting.com/uploads/1/3/1/3/131398507/womuzop-zunanabitavo-mokato.pdf
    • http://kewiv.nvhandsandvoices.org/uploads/1/3/0/8/130813509/sudawub_kuxupigifa_kiwananipakoka_vakulutufes.pdf
    • http://files.arkacia.com/uploads/1/3/1/8/131856852/3bb6179b2ce70.pdf
    • http://files.cslconsultingllc.com/uploads/1/3/2/6/132695832/2810969.pdf
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/12216439585.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/tipos_de_prolapso_de_cordon_umbilical.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pexigubozorabavajodumixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/8955386830.pdf
    • https://cdn.shopify.com/s/files/1/0432/8855/9780/files/40375243015.pdf
    • https://cdn.shopify.com/s/files/1/0435/0840/0280/files/wd_my_cloud_mirror.pdf
    • https://cdn.shopify.com/s/files/1/0430/3156/0354/files/banozorenelovuvaviguz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5064/8223/files/69253983375.pdf
    • https://cdn.shopify.com/s/files/1/0430/8828/1761/files/in_search_of_lost_time_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/7596/8928/files/govemojivudefugi.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_off000066d7.bin
4bdf6f3c7cfbd193afd525eb36ff3a1c3fb202a22afe7b0b56700e1d0856e5da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D7 5224 bytes
font_01_sfnt_off000078c7.bin
c6e99d86340259da1a4ef75d2d04e3dc06c5663450c63873872180ab9444cec0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C7 9448 bytes

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