Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3848a45acc71fe5…

MALICIOUS

PDF

43.4 KB Created: 2020-08-19 00:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68a1fd0c88a43636ac1bde945d9dfb26 SHA-1: f42baa08868cecb9351536c547fdc8e6ed5e337e SHA-256: c3848a45acc71fe594bdd3616d789743e7002b42faf71b8c555d556a4ed0e51c
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'blank thank you card template'. The presence of a link farm and a call-to-action phrase further supports a phishing or redirection attempt. The primary malicious IOC is the redirector URL.

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=blank+thank+you+card+template+word
    • http://gujifaki.broadbandbytes.com/uploads/1/3/0/8/130814310/gukivokikapises.pdf
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/38686633868.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/xenamavezexono.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/pokawujafurefowexubasuto.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0119/files/oxford_hematology_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/0141/3785/files/bohemian_rhapsody_classical_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0438/2877/3021/files/posevidunibefujesokal.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/64822452902.pdf
    • https://cdn.shopify.com/s/files/1/0433/2231/0811/files/31697125959.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9663/files/vopesomawuzirupuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/2629/2634/files/cfa_institute_books_level_1.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/86464127498.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_off00006c8d.bin
3be9ca90d2cb8dd368f5ce5913b5550f9e0ca4a349e00cbf5aeb8f895bba29fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8D 5440 bytes
font_01_sfnt_off00007ef8.bin
1d9d7b731a6908722c3dc2eac0a85b5cb946e15c0f0ad8e44fdd659d7616ca09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF8 10008 bytes

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