Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0d10d3ecaf1257…

MALICIOUS

PDF

40.6 KB Created: 2020-08-31 13:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67725b0f07ae97a11cd2dc35b4d31bef SHA-1: c61c01c5be65582fe2949d3938d3c694db971427 SHA-256: 2d0d10d3ecaf1257cbc9d5647d8df3a153e5f54d950f65efebc1c1bb82bc221e
120 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.com/pify?keyword=mathematics+grade+7+pdf'. Additionally, it exhibits a PDF SEO link farm pattern, embedding numerous external links, with the first being 'https://cdn.shopify.com/s/files/1/0432/8269/4312/files/37004066465.pdf'. The document body, though partially corrupted, contains text related to 'Mathematics grade 7 pdf' and the wkhtmltopdf tool, suggesting a lure to disguise the malicious link as educational content.

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.com/pify?keyword=mathematics+grade+7+pdf
    • https://cdn.shopify.com/s/files/1/0432/8269/4312/files/37004066465.pdf
    • https://cdn.shopify.com/s/files/1/0434/1946/7943/files/wobet.pdf
    • https://cdn.shopify.com/s/files/1/0434/9958/5696/files/safety_abbreviation_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/pivigosisafitejokab.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7328/files/catheter_insertion_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0440/1951/5557/files/fatuzoxeti.pdf
    • https://cdn.shopify.com/s/files/1/0438/0485/2381/files/vilav.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8774/files/bayesian_decision_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/sujosofavotodilogobu.pdf
    • https://static.usrfiles.com/ugd/4b7290_f25e9cbeb5dd45ecaefb04a6c9979b39.pdf
    • https://static.usrfiles.com/ugd/c5d40f_ddcd4250c2d2426aa070d8f0631dd5c6.pdf
    • https://static.usrfiles.com/ugd/36f25b_05b4333d32dc4630ad04074692fb846c.pdf
    • https://static.usrfiles.com/ugd/d94ae5_29037a4a7bca42e98f9a557865cc40fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8a3b5f26b1c43e3b0c78f03e4a0e224.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_off00006060.bin
a97638136351ae2e8953a7c96b62ab614f3455c3243374a9f8296d06984e0036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6060 5620 bytes
font_01_sfnt_off00007369.bin
cfb90e4705d9971f43e81e6f515c02f9a9af394fda8d1dabeb891ca70481c0aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7369 10172 bytes

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