Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f0141d385079fb4…

MALICIOUS

PDF

38.1 KB Created: 2020-08-30 02:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65f501708dafe6c127a1352738667681 SHA-1: f3e9a370d55ebff8ac1405f1bcdd69c5ff700469 SHA-256: 4f0141d385079fb465e0b5015cd15881d2e2abdfd76594a52aa44bae2bd9294f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which are hosted on cdn.shopify.com and appear to be part of a link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/wix?keyword=corbin+ky+homes+for+sale'. The document body, though heavily obfuscated, contains text related to real estate and the redirector URL, suggesting a lure to a malicious site.

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/wix?keyword=corbin+ky+homes+for+sale
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/pobosuvurawe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/59802595144.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/oxford_dictionary_file_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/font_awesome_library_file.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/please_find_attached_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7584/files/gefopulepeledu.pdf
    • https://cdn.shopify.com/s/files/1/0440/0149/3142/files/closers_survival_guide.pdf
    • https://static.usrfiles.com/ugd/3e87bf_d3abb3c1a6794fdfa9f37902e9f9e646.pdf
    • https://static.usrfiles.com/ugd/b8c837_6750a3ee64b34a2597d692cbba752b09.pdf
    • https://static.usrfiles.com/ugd/b8c837_f700d46583144fc38939bec58969a510.pdf
    • https://static.usrfiles.com/ugd/6c032c_632a200165124ccf8c9847a59a1fbffc.pdf
    • https://cdn.shopify.com/s/files/1/0435/8379/9459/files/cara_browsing_dengan_gambar_di_android.pdf
    • https://cdn.shopify.com/s/files/1/0460/9182/9412/files/english_grammar_tenses_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/3644/1752/files/chicago_building_code_violations.pdf
    • https://cdn.shopify.com/s/files/1/0437/3030/5178/files/m_s_swaminathan_committee_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/2149/2643/files/80613049416.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_off000057d5.bin
a2322739df6ffde8d31e918076e8d4fda4965c9f46d5c0e7c253f3c0b586eeb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57D5 5216 bytes
font_01_sfnt_off00006967.bin
f5d83f6b8bed3bcb353defcebb346c9528b5595e2a0820873d09eec19b12f5e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6967 10040 bytes

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