Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d76f184a47f30c6…

MALICIOUS

PDF

43.2 KB Created: 2020-08-07 16:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76d90fc6672a37831204e69f9841575c SHA-1: 8df2ea3574015a629fc0bae177be01810c5fe926 SHA-256: 2d76f184a47f30c62482ff95487fb61c9ba816c664e0d936b471089a48a181c9
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 of which point to a link farm hosted on Shopify. One of these links, disguised as an accessibility checker, redirects to a known malicious domain (ttraff.ru). This indicates a social engineering attempt to lure users to malicious infrastructure. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact payload.

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=pdf+accessibility+checker
    • http://files.ndpol.com/uploads/1/3/1/1/131164399/wozivebavi.pdf
    • http://files.lisakalma.com/uploads/1/3/1/8/131871852/gigupasalaweda.pdf
    • http://files.rostrevortennisclub.org/uploads/1/3/1/4/131452806/terefabazijese.pdf
    • https://cdn.shopify.com/s/files/1/0439/3120/5787/files/32150874561.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/98573747161.pdf
    • https://cdn.shopify.com/s/files/1/0434/0409/9735/files/basic_symbolic_logic.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/2123633085.pdf
    • https://cdn.shopify.com/s/files/1/0431/9290/9987/files/peter_pan_james_matthew_barrie.pdf
    • https://cdn.shopify.com/s/files/1/0433/6582/6719/files/62245602642.pdf
    • https://cdn.shopify.com/s/files/1/0437/0127/2729/files/fire_battlestaff_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0429/8116/3157/files/rimexo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/fowuvenetimo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4264/3868/files/merge_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/vuxuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/6562/2184/files/pafuwibewujewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/upsc_books_in_marathi_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/nejesuw.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_off00006b00.bin
611d741783f6e4a3a5cf14086cb66bbecf6cb45a4c1c633da3a405da0a9aa08e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B00 5416 bytes
font_01_sfnt_off00007d6a.bin
6e9387155a1697a446b8d2904700b48bae0169173b02a308d154e1d76a9e063a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6A 9932 bytes

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