Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7c49bc3e8d6d0b…

MALICIOUS

PDF

51.9 KB Created: 2020-08-24 13:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6f723888899c538871aa32441d60d0a SHA-1: ae9c4f865dec2483532aac4ca7e7523efaf746d0 SHA-256: fa7c49bc3e8d6d0b76b54d47e0c022970906279f6aa6658a8a55155bc07e24b3
128 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing numerous external links to other PDF documents, primarily hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=activesheet.+listobjects.+add+dynamic+range', is flagged as a malicious redirector. The presence of a 'download button' lure further suggests a malicious intent, possibly to trick users into downloading further malware or visiting malicious sites. The document body contains garbled text and what appears to be a reconstructed URL, reinforcing the malicious redirector finding.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=activesheet.+listobjects.+add+dynamic+range
    • http://files.teaboks.com/uploads/1/3/0/7/130776673/bifaxajukubaxi-wefegojuro-mixoroja.pdf
    • http://files.burghyart.com/uploads/1/3/1/8/131871772/vevelu.pdf
    • http://files.oxfordshirekickboxing.com/uploads/1/3/2/7/132712206/2741632.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/21803201547.pdf
    • https://cdn.shopify.com/s/files/1/0435/7062/6723/files/93015018428.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9377/files/zixokoruruza.pdf
    • https://cdn.shopify.com/s/files/1/0435/0210/8836/files/zevizejorisosavakefebiri.pdf
    • https://cdn.shopify.com/s/files/1/0434/4607/5542/files/after_effects_cs6_tutorials_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/ravenloft_3._5_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/23832068719.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8997/files/94832506387.pdf
    • https://cdn.shopify.com/s/files/1/0440/3301/5958/files/etat_de_rapprochement_bancaire_cours.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50751207741.pdf
    • https://cdn.shopify.com/s/files/1/0453/2869/5451/files/cycling_jersey_template_eps.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9387/files/36520849712.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/16731598214.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000823b.bin
1d482f632d90a2ec97ed16d3d9a114401a73e42eb59d03bfbf9a82aad57c2a74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x823B 5752 bytes
font_01_sfnt_off0000959d.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x959D 1800 bytes
font_02_sfnt_off00009e2a.bin
72dbb407d8ed7be91ed47dee9573d9c4d28c2b23500414b17dde2d0cf8563c62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E2A 10548 bytes

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