Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c4880fd824e710d…

MALICIOUS

PDF

48.4 KB Created: 2020-08-14 09:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86187f138a3fb66e4dba0f492bfbee1f SHA-1: 3fb4d71a08b8415a19ef0ac12891e59ed1e737e3 SHA-256: 8c4880fd824e710d75e6ce7925ef8e6dee34594a28ec76ffb7bc7ba49cf21deb
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to 'ttraff.ru'. The document body, though heavily obfuscated, contains the text 'Baked salmon nutritional information' and the malicious URL, suggesting a lure to trick users into visiting a malicious site. The PDF also contains a large number of external links, indicating a link farm, with the primary domain being cdn.shopify.com.

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=baked+salmon+nutritional+information
    • http://deperi.irabea.com/uploads/1/3/0/9/130969440/sivab.pdf
    • http://files.viennaartstudio.com/uploads/1/3/0/7/130775310/loxosaripi.pdf
    • http://zoxoxavo.blisjournal.org/uploads/1/3/1/8/131856158/nadopibetudiladuseb.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/letavonegabad.pdf
    • https://cdn.shopify.com/s/files/1/0428/5943/0054/files/du_bsc_chemistry_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0435/0191/2224/files/fuxigif.pdf
    • https://cdn.shopify.com/s/files/1/0440/6686/5302/files/genetics_neet_questions_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0862/files/pdf_xchange_lite.pdf
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/nawofalekawefi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0360/1308/files/tubobevinorumogarufiju.pdf
    • https://cdn.shopify.com/s/files/1/0440/2456/1829/files/14262370830.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/66764739969.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/jivixugejutiziwugobil.pdf
    • https://cdn.shopify.com/s/files/1/0452/8783/3762/files/thinkpad_13_psref.pdf
    • https://cdn.shopify.com/s/files/1/0437/5304/6165/files/job_application_letter_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/0509/9675/files/gogobuzubimilimolozeg.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/
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/jivixugejutiziwugobi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073f9.bin
6f46563b850548da9a51a525bd227d07c4b8db1bf890362918b1faaf5673c23f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F9 5168 bytes
font_01_sfnt_off00008570.bin
c94935c63e441ee2aa81ac12f21bd2cbcc48be4512fa538a95f4dad02988b597		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8570 15204 bytes

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