Malicious PDF — malware analysis report

Static analysis result for SHA-256 409a6a81aed54f08…

MALICIOUS

PDF

46.0 KB Created: 2020-08-08 09:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad24ada7182fb40a7993338f1e9f9383 SHA-1: 2a496ba0905c62988814ada0393aafc5afe43e8b SHA-256: 409a6a81aed54f084721793e49e29babae96bfc54bbad4bd6a82566fa7bd36e3
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to what appears to be a link farm designed for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=share+certificate+sample+pdf'. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=share+certificate+sample+pdf
    • http://files.sonnambula.org/uploads/1/3/0/7/130776416/zetowukeko_nazogosulifunim_xupos_poziwijemaki.pdf
    • http://files.laviishluxxe.com/uploads/1/3/0/7/130775942/1a41a3f.pdf
    • http://files.excelerationstudios.com/uploads/1/3/2/6/132681634/tabad.pdf
    • http://files.michal.shilor.com/uploads/1/3/1/3/131397987/3769604.pdf
    • http://files.shuckandassociatestherapy.com/uploads/1/3/0/8/130813614/wibunaxu_miwaxof_fekatavufarul_lenatodagilap.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/komibisu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2384/files/totazusevujip.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/41303251793.pdf
    • https://cdn.shopify.com/s/files/1/0440/5228/3542/files/meladapixut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevegijetowid.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/88586866885.pdf
    • https://cdn.shopify.com/s/files/1/0436/7558/2617/files/detukepokafutexaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/lamaxikuxugexaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/graphing_slope_intercept_form_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/9094/2888/files/wajaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8394/7414/files/risperidone_davis.pdf
    • https://cdn.shopify.com/s/files/1/0436/6349/1222/files/2307192651.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_off000069e4.bin
cf02f75fba60a42d73c6904c6af349aa655f41f10cbafc552237b47ffe7dbe23
pdf-font-stream PDF embedded font (sfnt) at offset 0x69E4 5072 bytes
font_01_sfnt_off00007b1d.bin
e0ec46100437c00bb36292a03aba1d45336c6f5d6243c7b81c4ce83e8af09efb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1D 9948 bytes
font_02_sfnt_off00009cf7.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF7 4324 bytes