Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5dcc55acb3dc86…

MALICIOUS

PDF

36.6 KB Created: 2020-08-25 20:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab996f7724c67dc6ace13901ecec2153 SHA-1: c7167c26507ae7dd72728a12adae77fa9ae3816a SHA-256: fe5dcc55acb3dc86e39fc735d2e980034a7d900be00f3466d341c220ee363f97
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, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=optimist+creed+christian+larson', is designed to lead users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to benign Shopify URLs but including at least one other potentially malicious URL. The ML classifier strongly flagged this PDF as malicious. 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=optimist+creed+christian+larson
    • http://kogag.qwirkykakes.net/uploads/1/3/1/8/131856166/gujifavitud_vezisudajoju_maboxabilided.pdf
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/microelectronics_circuit_analysis_and_design_neamen.pdf
    • https://cdn.shopify.com/s/files/1/0440/2796/9686/files/oxford_word_skills_intermediate_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/nujedodozofebaruwig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zudofujavulasosajawigubi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4658/4999/files/lowiwomabo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8979/files/rotudemenikipajemoxami.pdf
    • https://cdn.shopify.com/s/files/1/0433/1094/0328/files/multivariable_calculus_stewart_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/7966/3765/files/mewem.pdf
    • https://cdn.shopify.com/s/files/1/0445/1673/7183/files/437294319.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/65521511588.pdf
    • https://cdn.shopify.com/s/files/1/0439/7809/6798/files/makalah_akuntansi_keuangan_sektor_publik.pdf
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/98522109683.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_off0000457a.bin
f3ca704f64aaf16e98f040587443b9d2ee66a3232b379aaab0051b063e46e47d
pdf-font-stream PDF embedded font (sfnt) at offset 0x457A 5128 bytes
font_01_sfnt_off000056b6.bin
07ca61d79ed56b4f41df90196253fc577406662c0b5e9b7aa4a706acc52ee8b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x56B6 9568 bytes
font_02_sfnt_off00007774.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x7774 4324 bytes