Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a4961117224a2f…

MALICIOUS

PDF

36.3 KB Created: 2020-08-17 05:17:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 039d51499a6cc284c5a06e769d7383a3 SHA-1: 1a5462e107324609feb26ab3903914ba1f430545 SHA-256: 25a4961117224a2f1cf8ae1302b7923a6f2c05a1e881cde255eb9c48d4bcf8f8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=suede+ankle+strap+platform+heels'. This URL is embedded within the document body, suggesting an attempt to trick the user into clicking it. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=suede+ankle+strap+platform+heels
    • http://tejamipew.greenvillegirlcollective.com/uploads/1/3/1/4/131406650/1bd6696278.pdf
    • http://files.coloradosdesign.com/uploads/1/3/1/8/131856398/nikasuxadobifuzatew.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3863/files/rajidenetojofizavomujo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6343/3621/files/39706009272.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/fetarisebuwirud.pdf
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/21030543566.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/8389755026.pdf
    • https://cdn.shopify.com/s/files/1/0434/4718/9670/files/xijosubitarut.pdf
    • https://cdn.shopify.com/s/files/1/0431/3687/6706/files/allen_bradley_powerflex_400_vfd_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/47532681494.pdf
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/9768559865.pdf
    • https://cdn.shopify.com/s/files/1/0433/6559/7342/files/phytochemical_analysis_of_vernonia_amygdalina.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/modelo_de_base_de_datos_orientado_a_objetos.pdf
    • https://cdn.shopify.com/s/files/1/0435/3795/7023/files/xesobodovegezuzijuk.pdf
    • https://cdn.shopify.com/s/files/1/0439/5103/0430/files/pilinafewiwijafasogotim.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_off00005016.bin
069e17b15d7cb04166f0649e23e71ee863fcc2b5e7d8fed6d74d77c3524933e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5016 5448 bytes
font_01_sfnt_off0000626c.bin
7ef99dc381a6533ffb5fc223b6a8e71f0c5bab1cb03b1738b1b2751c324c2d5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626C 9936 bytes

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