Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a43eebeb3dd330…

MALICIOUS

PDF

33.3 KB Created: 2020-07-11 10:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15d63412de96b185b76e28c7e81d5e5e SHA-1: 14257acbdbd94f95e6d6c212543a603e39c95476 SHA-256: 98a43eebeb3dd330033d9c735826ae5743fc6a833975605c1f9fb9249f8ff683
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body also contains a call-to-action phrase, suggesting a lure to download or access further content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=bnf+74+pdf+download, which likely leads to a malicious payload.

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=bnf+74+pdf+download
    • http://files.paulkruegermusic.com/uploads/1/3/0/8/130874564/wekifiwozivudinow.pdf
    • http://files.oace.co/uploads/1/3/1/3/131381781/parotakime.pdf
    • http://files.stagcoffeecardiff.com/uploads/1/3/2/6/132695493/liralugebimol-gimogiti-dalidorinesali-laved.pdf
    • http://files.balancedespitethechaos.com/uploads/1/3/0/9/130969817/mevobaxuwagowu_mavorivex.pdf
    • http://files.heavyrent.nl/uploads/1/3/1/3/131398591/duwewufu-vexatanakoloju-getonebid-dapazawoketu.pdf
    • http://files.northernsoundandvideo.net/uploads/1/3/2/6/132681757/7555203.pdf
    • https://zolitoz.files.wordpress.com/2020/06/59899652332.pdf
    • https://zapuwujila.files.wordpress.com/2020/07/25002143876.pdf
    • https://zodamutove.files.wordpress.com/2020/06/zigitad.pdf
    • https://tamabofupema.files.wordpress.com/2020/07/tolitaditipero.pdf
    • https://merujazuxidi.files.wordpress.com/2020/07/60930600800.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/14981909947.pdf
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/19998562017.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91300886864.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwizesovipijekugufex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gejazopemovaro.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_off000047a1.bin
8625e34b20466699d6cb5532351c2cb8af83be863295aada085221bb69a0f7c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x47A1 4612 bytes
font_01_sfnt_off00005771.bin
86c1cbcd60d210f77e9cd633c90bbd7df4b47b23f2ccea01dc0a52e69bea9c09
pdf-font-stream PDF embedded font (sfnt) at offset 0x5771 9632 bytes