Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cca710db37fb027…

MALICIOUS

PDF

42.1 KB Created: 2020-08-28 20:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 056309ed805323cf2668a76239e6aef9 SHA-1: 54744d83e80d594d7241b8d83a1bdb7dc05cb493 SHA-256: 8cca710db37fb02765ad0769b0193b3efcfb92ed79fb4a041f422817e95fccb2
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=descargar+audacity+full+mega'. Additionally, it exhibits a PDF link farm heuristic, suggesting an attempt to distribute or obscure malicious content through numerous external links. The presence of a visual download button lure further supports a social engineering attack pattern. While no scripts were extracted, the combination of the malicious redirector and link farm indicates a high likelihood of a download or redirection to malware.

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/wix?keyword=descargar+audacity+full+mega
    • https://static.usrfiles.com/ugd/b8c837_bdc485f64a9e4057b15f325d968dca48.pdf
    • https://static.usrfiles.com/ugd/b8c837_c08fcbbed20741a2b12fb4785c554676.pdf
    • https://static.usrfiles.com/ugd/b8c837_1120cf36c456447ea4535e950cd98174.pdf
    • https://static.usrfiles.com/ugd/b8c837_50302e195d97412e80bf43dd01a2dd3b.pdf
    • https://static.usrfiles.com/ugd/b8c837_48d56d99f5db44099dd19650b14b9f03.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a9734a297ca4871a6edb910b305b522.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bijalikupuxamimidesedol.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/3685129217.pdf
    • https://cdn.shopify.com/s/files/1/0429/3813/8783/files/viwibezibesubu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9092/8026/files/blood_report_wbc_high.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/italiano_insurance_tampa.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_off00005b32.bin
d5465d50fc7d620bbf1d1c7537af694605996c80edc450789c8547ebabf69a40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B32 5444 bytes
font_01_sfnt_off00006da5.bin
7ac28775ab865069ff44a4ddb6f013a3a8be6f4b1a01ff2f202777f7350952c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA5 14884 bytes

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