Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ac8eecde8ac82f…

MALICIOUS

PDF

52.7 KB Created: 2020-08-12 13:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6446c1175426cd0d3a39f1cef18af418 SHA-1: 58fdc4d91aa0da3b767345b2a9d505415337998c SHA-256: e5ac8eecde8ac82fee66b6e490fd3af5d03d42ede2cbde8348afd042649c40b1
120 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, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=barriers+to+entry+monopoly+pdf', likely leads to a malicious site. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to PDF files, many hosted on Shopify. The primary intent appears to be directing users to malicious infrastructure through deceptive links.

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=barriers+to+entry+monopoly+pdf
    • http://files.hedyrieglestudio.com/uploads/1/3/1/4/131437552/5592870.pdf
    • http://files.surrenderedtochrist.org/uploads/1/3/2/6/132681656/wulegi.pdf
    • http://files.bernadettemccormack.com/uploads/1/3/0/8/130874163/fafofamagopi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9564/5589/files/astm_a351_standard.pdf
    • https://cdn.shopify.com/s/files/1/0437/1090/6520/files/14571084511.pdf
    • https://cdn.shopify.com/s/files/1/0429/2896/3747/files/42330602171.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3747/files/82777541843.pdf
    • https://cdn.shopify.com/s/files/1/0452/9052/0738/files/53537753116.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/doxijurijiladok.pdf
    • https://cdn.shopify.com/s/files/1/0440/6856/9238/files/system_analysis_and_design_lecture_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/bekuvufexolafipazevetufo.pdf
    • https://cdn.shopify.com/s/files/1/0447/7979/8679/files/euclidean_algorithm_in_cryptography.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/5221092596.pdf
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/perat.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_off000091b0.bin
910cb6a5dfcc3ed2127e9c49b36e1ef947956c1d641a0ccbb21bd6099ddc241d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91B0 5336 bytes
font_01_sfnt_off0000a3c8.bin
89e43cc7dada5dbb16b23a58c091693e385bf194843a7f63e8e1ef7fa9404664		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3C8 10040 bytes

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