Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ca05cf2e9bd587…

MALICIOUS

PDF

38.7 KB Created: 2020-08-30 10:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54684880135301b44eab6d3a8ffa6ad9 SHA-1: e9d2ecf90c458fa983a30486f1db2f8420acc90f SHA-256: c0ca05cf2e9bd587a079f52c6789a8600f83acdab9ef174593b56132d35dbe54
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of the primary links directs to a known malicious redirector. This suggests a link farm attack designed to obscure the ultimate destination and potentially distribute malware or phishing content. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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.com/wix?keyword=a+handbook+for+classroom+instruction
    • https://cdn.shopify.com/s/files/1/0431/1996/8417/files/punk_goes_pop_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5552762143.pdf
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/mupize.pdf
    • https://static.usrfiles.com/ugd/b8c837_971f29d3ee174c45a3ab1ecd491cf847.pdf
    • https://static.usrfiles.com/ugd/4479ed_203a77ed9a9944b7ac8845382c7a8ea0.pdf
    • https://cdn.shopify.com/s/files/1/0430/9853/8151/files/pixaziw.pdf
    • https://cdn.shopify.com/s/files/1/0438/6396/5861/files/zanif.pdf
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/49730119916.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/technical_project_manager_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/6612572328.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/westland_survival_mod_apk_blackmod.pdf
    • https://cdn.shopify.com/s/files/1/0437/1503/5290/files/2325101113.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/82709474071.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_off00005a5d.bin
43ce4a7aeb1acef0b43a0312b8237d0d6b00127033b217433ceeb504062b02cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5D 5452 bytes
font_01_sfnt_off00006cad.bin
1c6105734bce1cadff37c22c5ba4829d51e4acec6089c45b91848a748cd9b1a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAD 9812 bytes

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