Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ef02e734cecef2…

MALICIOUS

PDF

62.5 KB Created: 2020-08-12 08:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f81167ad8ecb4e17dc81d8872a44d5c7 SHA-1: c2bf3ea35db5f7cb7511cf865acecfdffbb3b1f8 SHA-256: 70ef02e734cecef2856176fc3a309141eeb53a9d75ced95add0d7d1c2bfd7a58
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass external link farm, with many links pointing to benign Shopify URLs but one critical link to a known malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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.ru/wb?keyword=cultura%20mochica%20ceramica%20pdf
    • http://files.carolinedancewest.com/uploads/1/3/0/7/130776308/510891.pdf
    • http://tamevugev.nea-salina.org/uploads/1/3/2/6/132683056/rawadofuruje.pdf
    • http://files.marcellamassa.com/uploads/1/3/0/8/130873791/8682566.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9046/9283/files/33907346694.pdf
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/75650250398.pdf
    • https://cdn.shopify.com/s/files/1/0435/0964/5478/files/boolean_algebra_notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/8374/9781/files/ripunovotida.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7815/files/75253138638.pdf
    • https://cdn.shopify.com/s/files/1/0430/1648/7065/files/swiftui_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/self_certification.pdf
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/pivenegim.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/binewoxovenoxaginogebo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/alternity_core_rulebook.pdf
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/sosovijo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/change_domain_name_wordpress.pdf
    • https://cdn.shopify.com/s/files/1/0439/9579/1518/files/effects_of_youth_unemployment.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_off0000b66a.bin
3ff5a9ab5777b5d3e9ccb15d181486804724a966e7e26ccd9dbddb79ddc6a033
pdf-font-stream PDF embedded font (sfnt) at offset 0xB66A 5124 bytes
font_01_sfnt_off0000c7af.bin
ca2021f7577e99ed009bd27abe9a7321b990e82168cd6e167208162081da5c36
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AF 10836 bytes