Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba5cbdb29303afc…

MALICIOUS

PDF

44.6 KB Created: 2020-08-31 03:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06993ee9f13b9ec7d04fed1558769d98 SHA-1: 10695cf0bc42efa713448b52918f2e741f06ada0 SHA-256: 2ba5cbdb29303afc8bd21e0273109c710553438e2f257eea93b2d7647ca1596b
150 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'. While many embedded URLs lead to benign Shopify domains, the presence of the malicious redirector and the ML classifier's high confidence score indicate malicious intent. The document body, though heavily obfuscated, contains the title 'Th8 upgrade guide' and the malicious URL, suggesting a lure to a malicious site.

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.ru/wix?keyword=th8+upgrade+guide
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/create_bootable_usb_mac.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2987/files/adding_and_subtracting_fractions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/libro_de_pablo_escobar_gaviria.pdf
    • https://static.usrfiles.com/ugd/b8c837_7bcc7ed12d6f4e20a27e744070c3c711.pdf
    • https://static.usrfiles.com/ugd/b8c837_53a242ddfb664530a6fc47c840efeb9d.pdf
    • https://static.usrfiles.com/ugd/d63aaf_5c9a509524374b498e5244fe9c5c6482.pdf
    • https://static.usrfiles.com/ugd/44b221_ea420a2219a74491a67074da16ed02a6.pdf
    • https://static.usrfiles.com/ugd/6240f8_22c597564cfe4fd5aeb72e622db34f1e.pdf
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/a_court_of_wings_and_ruin_common_sen.pdf
    • https://cdn.shopify.com/s/files/1/0434/0137/9996/files/zizosiriwurofobenozivejid.pdf
    • https://cdn.shopify.com/s/files/1/0432/0840/9250/files/bunubetalo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/purusomofoka.pdf
    • https://cdn.shopify.com/s/files/1/0431/8212/9320/files/frog_dissector._exe_win7.pdf
    • https://cdn.shopify.com/s/files/1/0431/0450/1922/files/72900740194.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7811/files/hardware_and_sanitary_items_list.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_off000071ae.bin
ccad17e453b6710e731c22c3eea61a021abddbadb2c2fb15f4288ee8536cde98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AE 5152 bytes
font_01_sfnt_off00008329.bin
3da548bad38e9f257fcb7ff3bca7b5ae2fe8cf1ca9226e1ce18d4b51c55cc973		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8329 9980 bytes

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