Malicious PDF — malware analysis report

Static analysis result for SHA-256 7420f61d9688cf71…

MALICIOUS

PDF

43.1 KB Created: 2020-09-03 15:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f73ec3a946d407b8e6807f878c94a6c4 SHA-1: e3bec202a6f5ca7a4e1128007acea7eec4ae8d64 SHA-256: 7420f61d9688cf7163b3b96aeece0c6e53229e21074d813cf266439ef432299d
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a search result for a popular application. This indicates a phishing or scam attempt. The presence of numerous other links, many pointing to benign Shopify PDFs, suggests a link farm used to obscure the malicious destination. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.link/wix?keyword=best+photo+collage+app++for+pc
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5762/4726/files/adding_apostrophes_to_possessive_nouns_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/ninuweregusuwisafabid.pdf
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/65414192943.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/zixiwizobatubuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2527/files/82945337952.pdf
    • https://cdn.shopify.com/s/files/1/0429/7631/3503/files/construction_bid_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/88432731056.pdf
    • https://cdn.shopify.com/s/files/1/0434/1825/5516/files/android_app_to_control_linux_pc.pdf
    • https://static.usrfiles.com/ugd/de3d83_d14a8c9be91341598b584c9ec4404494.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ae0dcf5291a4fcabc2834b713c7466a.pdf
    • https://cdn.shopify.com/s/files/1/0428/3485/4051/files/21899551917.pdf
    • https://cdn.shopify.com/s/files/1/0437/6736/5794/files/the_game_the_documentary_2.5_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9062/4158/files/tawebililerotevipebixe.pdf
    • https://cdn.shopify.com/s/files/1/0439/1777/0904/files/67997298061.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8626/files/gugixabibimade.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_off000069e2.bin
0b21393535f9a5caf69cf1fe6df21ac9b91dece9a55773430533cc870d911ed5
pdf-font-stream PDF embedded font (sfnt) at offset 0x69E2 5324 bytes
font_01_sfnt_off00007c05.bin
3e008fa3f04f8c092095dbe332957d87792fa9a80cb1e55584f0fa91ab9036c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C05 10364 bytes