Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7115478e2524ed5…

MALICIOUS

PDF

37.9 KB Created: 2020-08-30 13:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac8ad72f366e32e86925f71217859d71 SHA-1: 9ce49bcf9f26899ac50d3ec8b6aa61bb6cbd18e7 SHA-256: b7115478e2524ed5f591023c3d4b169fb2527bb33f2de71db14b86487278e693
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify and static.usrfiles.com, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/wix?keyword=tr+king+cfg+indir'. The presence of a 'download button' lure further suggests an attempt to trick the user into clicking malicious links. The document body is heavily obfuscated and contains the malicious redirector URL, reinforcing the malicious intent.

Heuristics 4

  • 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.
  • 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=tr+king+cfg+indir
    • https://cdn.shopify.com/s/files/1/0432/7168/4252/files/85748382678.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sogogetuxupoxex.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6799/files/wuzojovisanumovaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5217/9364/files/41994490468.pdf
    • https://static.usrfiles.com/ugd/16a96a_bf435a5434ec4c0cbdf0f92cde841cec.pdf
    • https://static.usrfiles.com/ugd/71fd01_05832a5fc0454ace8c0f97c7f4b2e5b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e25e3486ca94c258ba1421874a4e8f6.pdf
    • https://static.usrfiles.com/ugd/ab059d_3c24b611cfe14815b7b7fc46f273f586.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/caballo_de_troya_9_cana_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasamonuje.pdf
    • https://cdn.shopify.com/s/files/1/0462/2863/5797/files/dream_on_me_portable_crib_mattress_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/nofupowelokupeborevuj.pdf
    • https://static.usrfiles.com/ugd/8d57bd_713df2fb1a9a43b58abde97dbe6c0bc0.pdf
    • https://static.usrfiles.com/ugd/b8c837_36d5bb7b602e4182b67b03335d90b34f.pdf
    • https://static.usrfiles.com/ugd/40b9e6_d7e69ef150d040819d6f4433402330ce.pdf
    • https://static.usrfiles.com/ugd/8e1900_5f5ee540268547f9a491901b659702bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd3e25d7631a44d99af8c9a5ed94781c.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_off00004cf6.bin
b7541b66ce8b9ed8ddb6a4c7b38f5024975b4b48e5bbbe77ecd7bdc9578213c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CF6 4784 bytes
font_01_sfnt_off00005d3d.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3D 1800 bytes
font_02_sfnt_off000065cb.bin
2741a548168f95df78f44ed564f3d2e24eb49dbeb602ccf0226c24ac26bad416
pdf-font-stream PDF embedded font (sfnt) at offset 0x65CB 10816 bytes