Malicious PDF — malware analysis report

Static analysis result for SHA-256 40f8c0e036b039bd…

MALICIOUS

PDF

41.9 KB Created: 2020-08-12 05:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ba28035c468f56fd595ca2734f29489 SHA-1: 1336a8f5d1799159d3494d410025335a43bfbe01 SHA-256: 40f8c0e036b039bdf5f78b9a2e2b8e974f7e6a423c24870cc740c6b57c037e18
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=cabbage+diet+pdf', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to external, potentially harmful, content. No scripts were extracted from this sample.

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.ru/pify?keyword=cabbage+diet+pdf
    • http://files.chsurplusdirect.com/uploads/1/3/0/7/130738919/milolofakif.pdf
    • http://files.martinhartfilms.com/uploads/1/3/1/6/131636689/9521329.pdf
    • http://majewem.patchesoftimephotography.com/uploads/1/3/2/3/132303382/jokagoderajapodex.pdf
    • http://majewem.patchesoftimephotography.com/uploads/1/3/2/3/132303382/jokagod
    • https://cdn.shopify.com/s/files/1/0430/9581/8397/files/diferencia_entre_angina_estable_e_inestable.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/xorukalaxozuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/relizapovowetelo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/argumentative_essay_outline_high_school.pdf
    • https://cdn.shopify.com/s/files/1/0439/3644/8667/files/vukeloleludigetokif.pdf
    • https://cdn.shopify.com/s/files/1/0433/7405/1491/files/40572873334.pdf
    • https://cdn.shopify.com/s/files/1/0438/1471/5549/files/potassium_chloride_sds.pdf
    • https://cdn.shopify.com/s/files/1/0430/0596/8537/files/sinukogiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/7461/7511/files/41373403959.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/vaxagelajatixopidibuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/7068/4317/files/xoxinowefilibefaxanobap.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_off0000672d.bin
3f7461b40e782e79a317d005f79b53f9f0b6e47ae3f7264fcdb49d7bbe12a213		 pdf-font-stream PDF embedded font (sfnt) at offset 0x672D 4948 bytes
font_01_sfnt_off00007815.bin
03b0a3a866b7ead61def493953022980318a3bc605355398feb3b0db3f299f18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7815 10072 bytes

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