Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfecc4420237c8ea…

MALICIOUS

PDF

51.5 KB Created: 2020-08-11 01:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a927a354720e933010db511224a71e42 SHA-1: ac70a50d8198f50feb60c602de0f2de5ad498ea6 SHA-256: bfecc4420237c8ea716365c4ba73f95451afec11641f3c842a9d09cce47a85b1
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=catalogo+carmel+campa%25C3%25B1a+16+2020+pdf'. This indicates the document's primary purpose is to redirect the user to a potentially harmful site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=catalogo+carmel+campa%25C3%25B1a+16+2020+pdf
    • http://files.chimchimcheroo.com/uploads/1/3/2/6/132681969/2d742374e8de17.pdf
    • http://files.aretemediaacademy.com/uploads/1/3/0/7/130775361/c561187bb877bfc.pdf
    • http://kugegivo.boogieintheburgh.com/uploads/1/3/1/4/131437378/5e509.pdf
    • http://files.woodlandsfrenchies.com/uploads/1/3/1/3/131383553/buvomagedax_dopiriveluk.pdf
    • http://sexurex.industrialtucson.com/uploads/1/3/1/4/131453133/fd67ee2da05b14.pdf
    • http://carmel.com.co/flippingbook/2016/edicion10-2/index.html
    • https://cdn.shopify.com/s/files/1/0435/4146/3189/files/livikejowivajoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/6122/2307/files/photosynthesis_powerpoint_question_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/arborescence_site_web_exemple.pdf
    • https://cdn.shopify.com/s/files/1/0428/6890/0006/files/75887073345.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/81952769424.pdf
    • https://cdn.shopify.com/s/files/1/0432/5644/7136/files/zuxejufigorazukuvire.pdf
    • https://cdn.shopify.com/s/files/1/0430/1219/4457/files/faboduxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/70219034546.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8503/files/anti_terrorism_day_pledge.pdf
    • https://cdn.shopify.com/s/files/1/0437/7804/8151/files/alfonsina_y_el_mar_guitarra_clasica.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/97034302175.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_off00006ca7.bin
d8e27370db32ec87a4eacef171ef24de9a92b8f3e610fd2a045f114cdc8b1f79
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA7 5892 bytes
font_01_sfnt_off0000806a.bin
e834b0c9d74c6f47c4c30115f941952cf9f4bca03a7446722649786ca9453d63
pdf-font-stream PDF embedded font (sfnt) at offset 0x806A 12812 bytes
font_02_sfnt_off0000a9bf.bin
8c4f20850708d391b115a482448c651f2a982fbdf20ce527d670e7cbafe14b49
pdf-font-stream PDF embedded font (sfnt) at offset 0xA9BF 16232 bytes