Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b8ea5ba8583fe4d…

MALICIOUS

PDF

44.9 KB Created: 2020-08-06 14:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ba3b6cf0b72bb8bb10a7e028a0a6e83 SHA-1: 7e83f6a66f06d9118af8af7ce99fad492eeaa0c5 SHA-256: 7b8ea5ba8583fe4d12bc7fcbcb6ec9f29d6f4f09ce8dff3efffbde01e99a97a2
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs, suggesting a lure to download further malicious content. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack.

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=asthma+action+plan+pdf+texas
    • http://files.newlifetabernacleupc.com/uploads/1/3/1/0/131069978/67a619.pdf
    • http://files.pilgrimbaptistchurchdurham.com/uploads/1/3/1/4/131452838/3695862.pdf
    • http://files.gunitsponsorbootcamp.com/uploads/1/3/1/3/131380397/ca0c24.pdf
    • https://cdn.shopify.com/s/files/1/0431/2976/6039/files/28303366895.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/78460276483.pdf
    • https://cdn.shopify.com/s/files/1/0434/4794/3330/files/berserk_of_gluttony_volume_2.pdf
    • https://cdn.shopify.com/s/files/1/0435/5083/4847/files/lokoputexox.pdf
    • https://cdn.shopify.com/s/files/1/0439/5198/0712/files/97038758629.pdf
    • https://cdn.shopify.com/s/files/1/0437/9777/4497/files/61009164155.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/46902406380.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0694/files/dagirajafi.pdf
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/silver_strand_surf_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2831/files/minecraft_castles_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/88134222421.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_off000071bb.bin
bde437519aa4fcda5473f287d55a8646a3d5a7cd6de3e603578b1f3c11ff7a3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71BB 5356 bytes
font_01_sfnt_off000083d9.bin
0ce869aed221a5e53cba6626726878844406a2ceb2f8d3c8a9559febb6beba3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83D9 10176 bytes

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