Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d76a58869bdcde…

MALICIOUS

PDF

42.8 KB Created: 2020-08-03 09:24:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1af6b17536691b08f68315f0c8bb9080 SHA-1: a3608b1040bdc71bb14c1291be5a9921208bb110 SHA-256: 57d76a58869bdcde342872329f9bcfacec970f911ed21a3e252849879fd5df7b
160 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as information about 'Kik messenger for pc'. It also features a large number of links to other PDFs hosted on Shopify, likely part of a link farm for SEO poisoning. The document body is heavily obfuscated, but the presence of the malicious redirector and the link farm strongly suggest a phishing or malware distribution attempt. The document also indicates it is a password-protected archive lure, implying it is intended to trick the user into downloading an encrypted payload.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.cc/pify?keyword=kik+messenger+for+pc
    • http://libep.sogo.cc/uploads/1/3/1/8/131858661/luxonimovida_navewosulibozas_wobosumuni.pdf
    • http://files.tarotevolution.net/uploads/1/3/0/7/130775403/7709077.pdf
    • http://files.webbcityfarmersmarket.com/uploads/1/3/0/9/130969573/fixepi.pdf
    • http://files.interwestelectricalsales.com/uploads/1/3/0/8/130874338/zesizibuvavodaramur.pdf
    • http://files.designnorthampton.com/uploads/1/3/2/6/132681494/6067441.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/bibimipobapixobawiponi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/gasidilajiwipilen.pdf
    • https://cdn.shopify.com/s/files/1/0428/1240/7967/files/97863976562.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/tawaganeguko.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5316/files/53860334800.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/max_int_java.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/xawusak.pdf
    • https://cdn.shopify.com/s/files/1/0432/8754/3964/files/kavukowekuzigesapi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/gifonedazexuvidiko.pdf
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/japan_porn_mag.pdf
    • https://cdn.shopify.com/s/files/1/0438/7838/3771/files/biochemistry_garrett_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/bekewuvalipesisuxatasedaf.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068fa.bin
54ac37ecbf8a58ba316f74f558f9c43dae642d0d97dc844d44d394cfec6b417c
pdf-font-stream PDF embedded font (sfnt) at offset 0x68FA 5128 bytes
font_01_sfnt_off00007a67.bin
5fe172ae4b12ecf3684dd1e0ad04aebc1a52250e2792e6122a32e0cf4d92ac4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A67 11028 bytes