Malicious PDF — malware analysis report

Static analysis result for SHA-256 8df820d690a27df6…

MALICIOUS

PDF

40.5 KB Created: 2020-08-11 01:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7974c28c9df44f20c70c4367550d58c3 SHA-1: 60a05a5aa70650801a1778b7d05221948d17647f SHA-256: 8df820d690a27df6ef6113ebb0e922cacffc249cab9b99d469bda70e83ee63ce
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=third+grade+spelling+list+pdf'. Another critical heuristic identified a link farm of external PDF links, with 'https://cdn.shopify.com/s/files/1/0448/0499/7271/files/neat_adf_scanner.pdf' being the first listed. The document body, though heavily obfuscated, contains the same URL, suggesting a social engineering lure to a malicious site.

Heuristics 3

  • 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.
  • 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.com/pify?keyword=third+grade+spelling+list+pdf
    • http://files.addictionrecoverymovement.com/uploads/1/3/1/4/131437878/bavizaruwavukasodowi.pdf
    • http://files.azmusicproject.com/uploads/1/3/1/3/131378990/zejuvekupov-tamid-tomirajiwub-mufaredaku.pdf
    • http://files.mdchildrenentertainment.com/uploads/1/3/0/8/130814907/8646779.pdf
    • http://files.aishac.com/uploads/1/3/1/4/131406977/takemegakexixozo.pdf
    • http://files.lakeeriefiberarts.org/uploads/1/3/1/3/131384136/tivesar_powotiwu.pdf
    • https://cdn.shopify.com/s/files/1/0448/0499/7271/files/neat_adf_scanner.pdf
    • https://cdn.shopify.com/s/files/1/0435/2281/8200/files/pilirunawijotikim.pdf
    • https://cdn.shopify.com/s/files/1/0440/7413/9813/files/50102185211.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/dns_error_assist_att.pdf
    • https://cdn.shopify.com/s/files/1/0433/8447/1719/files/89843335294.pdf
    • https://cdn.shopify.com/s/files/1/0438/4840/1046/files/97861682970.pdf
    • https://cdn.shopify.com/s/files/1/0433/5016/3609/files/how_to_play_rook.pdf
    • https://cdn.shopify.com/s/files/1/0438/1789/4050/files/como_fazer_uma_apresentao_de_empresa_em.pdf
    • https://cdn.shopify.com/s/files/1/0437/0645/0074/files/godatulofusarosonike.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/24220876404.pdf
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/voluwaranimivib.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_off000060ac.bin
75eacc79d3796a15c53e3b88b5a7eb6e8e8d68996fd4ee842c41f18df01b450a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AC 5252 bytes
font_01_sfnt_off00007281.bin
91ada997eaa4dcf6c33ac847f6ebbfb07eae43bab40541414f445649b46ffa79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7281 10028 bytes

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