Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e31ccc1e460afd5…

MALICIOUS

PDF

40.7 KB Created: 2020-08-21 07:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60a18a432c0f88f29ce57b49039ccfc5 SHA-1: d87e28e69752e25342cc889c6ab12f220dd1d14f SHA-256: 8e31ccc1e460afd57932e609ecf08c992b8834ae1cab25b7f3489e0e83bdf263
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=cardboard+sheets+brisbane'. This URL is presented within the document body, disguised as a search result. The file also exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The primary malicious URL is the most critical IOC.

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=cardboard+sheets+brisbane
    • http://dudur.norwoodcenter.org/uploads/1/3/1/8/131858540/kuzive.pdf
    • http://files.vertical-group.com/uploads/1/3/1/0/131070523/pidise.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/jilamugal.pdf
    • https://cdn.shopify.com/s/files/1/0429/5072/1699/files/dalilu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
    • https://cdn.shopify.com/s/files/1/0439/0577/7832/files/bagalujibipira.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9177/files/percy_shelley_poems.pdf
    • https://cdn.shopify.com/s/files/1/0437/6333/5319/files/fazarutoxejedalat.pdf
    • https://cdn.shopify.com/s/files/1/0432/9177/1046/files/xogopexalavutufakis.pdf
    • https://cdn.shopify.com/s/files/1/0433/6346/7414/files/safiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/6875/8943/files/bomarokexiwelaruparixo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2669/2771/files/83468328855.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36283751979.pdf
    • https://cdn.shopify.com/s/files/1/0430/0108/6111/files/picsart_old_apk_uptodown.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_off00006176.bin
68aff043a026eabbbc9945c180d0812b77d068ff81d318fd7d4467ed1de689b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6176 4924 bytes
font_01_sfnt_off00007226.bin
81812dd1c01d6c3084786c03f51a67407c42933d88621e8c1d87368e6f5fcd43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7226 10572 bytes

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