Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a5737ebb8841325…

MALICIOUS

PDF

47.1 KB Created: 2020-08-23 17:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6eaa7f79b49cd25e7641d61680f26fa8 SHA-1: cbbf77dc847dabdf7b01ffbe69a6aef9c6940cbe SHA-256: 4a5737ebb8841325dc21c76e3a84439a29628ab3a41cf92003561b7c36e63db6
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 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely to obscure the malicious destination. The primary malicious URL is https://ttraff.com/pify?keyword=accounting+dissertation+topics+pdf.

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=accounting+dissertation+topics+pdf
    • http://butosa.peterlaughton.com/uploads/1/3/0/8/130814297/gotijal.pdf
    • http://kuxov.lucaspbutler.com/uploads/1/3/1/3/131398140/3774725.pdf
    • https://cdn.shopify.com/s/files/1/0438/6521/1035/files/18005678818.pdf
    • https://cdn.shopify.com/s/files/1/0431/8806/0320/files/cash_app_apk.pdf
    • https://cdn.shopify.com/s/files/1/0436/4235/5865/files/jidoniwu.pdf
    • https://cdn.shopify.com/s/files/1/0463/3414/8763/files/40036932565.pdf
    • https://cdn.shopify.com/s/files/1/0431/8520/9507/files/kodiwomokon.pdf
    • https://cdn.shopify.com/s/files/1/0440/5703/4902/files/29195577452.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6394/files/45023927150.pdf
    • https://cdn.shopify.com/s/files/1/0430/5344/9365/files/7374757.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/bacteriologia_medica_ana_maria_castro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuxopikuxoxixu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/14074967722.pdf
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/20032576834.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6600/files/xezoga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.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_off00006c4a.bin
6cccf8605e3c537c0745a7aa23dd7fd691d75ed35593894704519ac0db23c743		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4A 5160 bytes
font_01_sfnt_off00007ddb.bin
cb8dca2c64c52c7b98a3e78cf723770e4c42b32083c21bccbbaab9ab25bdd186		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDB 10252 bytes
font_02_sfnt_off0000a0de.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0DE 4324 bytes

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