Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc697fc7497c9ee…

MALICIOUS

PDF

51.4 KB Created: 2020-07-29 07:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ef09526d0a1c2f80f05a76876e81c4a SHA-1: 3fd65a21ffe93c8f9f63c0d0add1bd4f1f9c206a SHA-256: edc697fc7497c9ee8a615de5f931d1edfd9701eed11d613c6caa98bff88108af
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. Another heuristic indicates a PDF link farm, with the primary URL being 'cdn.shopify.com'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs for SEO-based link farms. The presence of these links suggests an attempt to redirect users to malicious sites for further exploitation or phishing.

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/pify?keyword=ecuaciones+del+movimiento+rectilineo+uniforme+wikipedia
    • http://files.art4peace.net/uploads/1/3/2/3/132302871/8095265.pdf
    • http://files.oldfieldfarmhorseandhome.com/uploads/1/3/1/4/131453588/3342591.pdf
    • http://files.wlnhelena.com/uploads/1/3/0/8/130814601/c4bbd.pdf
    • https://cdn.shopif
    • https://cdn.shopify.com/s/files/1/0440/1774/6070/files/tigulelumilewuve.pdf
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/63397190687.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/6555160890.pdf
    • https://cdn.shopify.com/s/files/1/0433/5520/9879/files/rilabowuzuked.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/79431281249.pdf
    • https://cdn.shopify.com/s/files/1/0430/0052/9049/files/89906811778.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/bufogitutelosumekagonaxok.pdf
    • https://cdn.shopify.com/s/files/1/0435/8648/6440/files/zadaxezawumasuzolunixodeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/9535/0684/files/rigapepawezorom.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/dulapixeni.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_off00008833.bin
3e95acbff963b55ac2b747ec08ba8d9e4fb243416282c1e1d2e66bd47c430ce4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8833 5356 bytes
font_01_sfnt_off00009a63.bin
5836ef6d631e731586a6a19e2532c0e3a96513d2b9796c1d65218ab20b07a73f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A63 10844 bytes

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