Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdcf75c2b242145c…

MALICIOUS

PDF

43.2 KB Created: 2020-08-27 17:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94f4b908b0d20928526061791c5aeef9 SHA-1: ffce32b55db939688f3e09af01130b1c718b67f7 SHA-256: bdcf75c2b242145cdbb8aad41918e5fd778474ec1a6cf3b3e3d0c3dde32592b5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=5000+libras+a+kilos'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many hosted on Shopify. The document body, though partially corrupted, contains the same redirector URL. This suggests the primary intent is to lure the user to malicious infrastructure, likely for a phishing or scam operation.

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/pify?keyword=5000+libras+a+kilos
    • http://pebuni.jlschellenberg.com/uploads/1/3/1/4/131408832/zufeman-nalopukotur.pdf
    • http://files.empoweredmathematics.com/uploads/1/3/1/4/131454383/4240055.pdf
    • https://cdn.shopify.com/s/files/1/0438/9155/6504/files/zawuke.pdf
    • https://cdn.shopify.com/s/files/1/0439/9464/4638/files/81401540645.pdf
    • https://cdn.shopify.com/s/files/1/0429/3797/4940/files/gerawogaxowedilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/wezipol.pdf
    • https://cdn.shopify.com/s/files/1/0436/9465/3594/files/aix_basic_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/8252/1512/files/35962536174.pdf
    • https://cdn.shopify.com/s/files/1/0431/2478/5313/files/58344147038.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/thailand_map_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0460/8691/4212/files/dead_rising_4_mods.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/75307748825.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005738.bin
cabe16a108b03793472dbf11e6385d51e63e9b29a0634f35c192b8229497ca20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5738 5052 bytes
font_01_sfnt_off0000686a.bin
c70e2946bebf6dab5950bc8ca7a68ad2a841adad94f13d5f7fa13ebf634c93eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x686A 10460 bytes
font_02_sfnt_off00008ba4.bin
f4f5fb0209a4714c3cbdfe9b8e29dbdabffe5d2cbe58e8cc741460ff97ba63ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA4 16100 bytes

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