Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c4818d49f2794d…

MALICIOUS

PDF

38.5 KB Created: 2020-08-14 23:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 768b3d2636e41749f8f01e58bece2bf5 SHA-1: 7e2f3fe022a84fdffd8b572f0f27f1661a830b49 SHA-256: 72c4818d49f2794d0b1c75640ef2e6eaa4ad4ffa33654a96926201a89a963318
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body and embedded links suggest a link farm or SEO manipulation tactic, directing users to various PDF files, some hosted on Shopify. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector confirms a high likelihood of user compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wb?keyword=2008%20chevy%20trailblazer%20service%20manual
    • http://wazabe.madekwt.com/uploads/1/3/1/3/131398504/juzerenev.pdf
    • http://files.kingsdanceteam.com/uploads/1/3/0/7/130776246/885588.pdf
    • http://dotuwov.fringethesaloncarbondale.com/uploads/1/3/0/7/130776819/xikidavozasosavotur.pdf
    • http://files.sandraharveyphotography.com/uploads/1/3/1/3/131398406/1042773.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5969/2191/files/labaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4150/files/xogimevowu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0171/5622/files/97725169329.pdf
    • https://cdn.shopify.com/s/files/1/0447/4021/4940/files/abecedario_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0439/6243/3694/files/physics_laboratory_safety_rules.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/lemewemopinoxuru.pdf
    • https://cdn.shopify.com/s/files/1/0428/9436/0735/files/adjectives_word_search_puzzle.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1133/files/sonic_adventure_2_battle_ar_codes.pdf
    • https://cdn.shopify.com/s/files/1/0430/8543/0945/files/vijivit.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/avon_bottles_price_list.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005839.bin
08ad1d54144477e17a3837a9896a9529c894c5664fbd4ba81fbd8d687fd91c2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5839 5764 bytes
font_01_sfnt_off00006bb2.bin
83a5309750999298c623e0771891c32ed3eb92104bd7e898d211d21166ab1bc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB2 9768 bytes