Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3055ca62030b9a1…

MALICIOUS

PDF

41.3 KB Created: 2020-08-02 23:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b881efd8823acec9cba6718dc90595f SHA-1: 9d1216f174b6d247f888f8d95a41b28c8ce3b746 SHA-256: e3055ca62030b9a1a344d643c9e4562c1d30150ccf448c208572168142b9d6be
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.cc/pify?keyword=artificer+5e+pdf'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external PDF links, with 'https://cdn.shopify.com/s/files/1/0434/3129/7185/files/welagad.pdf' being the first identified. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to these URLs, suggesting the primary intent is to lure the user to malicious infrastructure.

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=artificer+5e+pdf
    • http://files.ulvertoncustomhomes.com/uploads/1/3/1/3/131381067/xukok_zapufotuxoz_gilawitop_xemukarokiwod.pdf
    • http://files.lesleehampelphoto.com/uploads/1/3/1/4/131437983/xogekulaxirigo.pdf
    • http://files.greensidegraphics.com/uploads/1/3/1/8/131871642/konetunor_dudibeboji_wimukewupafi.pdf
    • http://files.notanothersupermum.com/uploads/1/3/0/7/130775484/434ee3b83f.pdf
    • https://cdn.shopify.com/s/files/1/0434/3129/7185/files/welagad.pdf
    • https://cdn.shopify.com/s/files/1/0433/1683/8558/files/1139029173.pdf
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/56447404656.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53635556436.pdf
    • https://cdn.shopify.com/s/files/1/0433/4023/4902/files/21229583154.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/vidamedukibugalexekon.pdf
    • https://cdn.shopify.com/s/files/1/0431/2141/0210/files/bakavibidib.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/jasupugubiwitataxerubi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8802/7543/files/59332974366.pdf
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/61877703627.pdf
    • https://cdn.shopify.com/s/files/1/0431/2881/5783/files/48300958543.pdf
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/fodiromenururodeduzab.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_off000066c4.bin
9dc6c120bc11f419919ac47e1d705bece015ad2fe15b4845c9ec65331b448689
pdf-font-stream PDF embedded font (sfnt) at offset 0x66C4 4844 bytes
font_01_sfnt_off00007755.bin
84dc8dd16d654fdc4ee65c04ef7207ab49e5ee410d811f2653defbd592a8d126
pdf-font-stream PDF embedded font (sfnt) at offset 0x7755 9688 bytes