Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c121d21f83c787b…

MALICIOUS

PDF

48.2 KB Created: 2020-09-02 03:38:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f40282567482ef14731d3ec60a4036e0 SHA-1: 48fc67f200dcc896a707de0a18e6a76d3ea630ca SHA-256: 1c121d21f83c787bc6bbd30a157e973ae217532fe55e281a95b0e2fb5f320784
136 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body contains text suggestive of an invoice or payment lure, and also includes a call-to-action phrase. The primary malicious URL identified is https://ttraff.com/wix?keyword=bcom+degree+form, which is likely used to deliver a secondary payload or redirect to a phishing page. The PDF also hosts a link farm on Shopify, pointing to numerous other PDFs.

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=bcom+degree+form
    • https://cdn.shopify.com/s/files/1/0434/1999/2222/files/nisibudeva.pdf
    • https://cdn.shopify.com/s/files/1/0437/1339/6901/files/60432023610.pdf
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/xekobemamokolexolirapuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/50732222092.pdf
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/physiology_books_for_mbbs.pdf
    • https://cdn.shopify.com/s/files/1/0435/9559/5938/files/iphone_touch_screen_test.pdf
    • https://cdn.shopify.com/s/files/1/0435/2586/5636/files/borewusifarolodosiru.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/google_sheet_script_clear_range.pdf
    • https://cdn.shopify.com/s/files/1/0454/5295/1704/files/mathematics_functions_grade_12.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/vaginizibonujivo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/rogukavuwisi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2374/4674/files/pestilence_master_s_shroud_guide.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_off00006ae2.bin
0ee12a10ca370a58e5e8dfc4eba4bcde8743631934d0923f67c53b654447c615
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE2 4972 bytes
font_01_sfnt_off00007bbc.bin
8f6deb2ba06a3206c3adf719016bb12844f9bf9c8d09e731ea61dc6d9ee55660
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBC 10268 bytes
font_02_sfnt_off00009f0f.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F0F 16164 bytes