Malicious PDF — malware analysis report

Static analysis result for SHA-256 3269f54d47c7603b…

MALICIOUS

PDF

47.7 KB Created: 2020-09-10 10:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d431c381f57f515fe8c63acd2397cce SHA-1: 2d7547ab516f1d4e48ae3ce6cafbeece062ee0e0 SHA-256: 3269f54d47c7603b49d23e1655ba3d10bcc597641514cf0c98ad6dfabff3715d
120 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for a malicious redirector link, directing users to 'https://ttraff.me/wix?keyword=application+format+for+university+leave'. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious redirector URL and a benign-looking title, suggesting a social engineering lure. The presence of multiple embedded URLs, including one on a suspicious domain 'nogafaki.obafemio.com', indicates a likely attempt to redirect the user to malicious 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.me/wix?keyword=application+format+for+university+leave
    • http://nogafaki.obafemio.com/uploads/1/3/1/6/131607163/fawoduvaxajo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/97301927200.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/xunevojojegisa.pdf
    • https://cdn.shopify.com/s/files/1/0438/2566/0066/files/classroom_language_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/2480/0154/files/best_songs_of_ariana_grande.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/10623407173.pdf
    • https://static.usrfiles.com/ugd/b48b60_28c2f390dd1744cfb0b7844c96a384a7.pdf
    • https://static.usrfiles.com/ugd/ddb60a_65414805664e45c2ab51cadc5f693b35.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/voguvuwepunajijavaxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/51900917283.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/89666583734.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/wupumasumoken.pdf
    • https://cdn.shopify.com/s/files/1/0435/8910/7869/files/18138995632.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_off00006f95.bin
4f5c05727ce25157fb4edda16ab03b02c3873104e390c1e8152e0a7ba0fdb07b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F95 5192 bytes
font_01_sfnt_off00008127.bin
05f8bc4e933fceab29a49304a832762658f587ac58d967a02835a4297a9bfb3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8127 10288 bytes
font_02_sfnt_off0000a415.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA415 4324 bytes

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