Malicious PDF — malware analysis report

Static analysis result for SHA-256 79a7e4491f634ef4…

MALICIOUS

PDF

42.9 KB Created: 2020-08-22 17:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84fd6ab779fd633c74d25ea0da19bb6d SHA-1: fb80cdb083f1435eb0cc465fe37b160d1a9be08b SHA-256: 79a7e4491f634ef4b0a809cf66e2f81f7fd1eac0bb928a1e7bebebb81f416c95
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure via the URL https://ttraff.cc/pify?keyword=armstrong+cable+guide+butler+pa. The document body appears to be obfuscated or corrupted, but the presence of numerous links suggests a link farm or redirection tactic to lead users to malicious sites.

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.cc/pify?keyword=armstrong+cable+guide+butler+pa
    • http://files.curtsleague.com/uploads/1/3/1/4/131453177/mavofumefabefuses.pdf
    • http://getuzefab.kylespestsolution.com/uploads/1/3/0/9/130969600/zupaveki_xewogomes.pdf
    • http://gurovufos.ephrataeducationfoundation.org/uploads/1/3/1/4/131437361/5826809.pdf
    • http://luvab.khylor.com/uploads/1/3/2/6/132695540/wikovikime_lumejewixug.pdf
    • http://files.lanternaconsulting.com/uploads/1/3/1/3/131398177/vokot_webafedani.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/91501364877.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/31271316498.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/basal_ganglia_bleed.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/rasidujazidurene.pdf
    • https://cdn.shopify.com/s/files/1/0430/6170/6903/files/allan_kardec_livros.pdf
    • https://cdn.shopify.com/s/files/1/0446/2074/2819/files/12494176719.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/zotulap.pdf
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/14323160770.pdf
    • https://cdn.shopify.com/s/files/1/0437/1261/0472/files/44703306230.pdf
    • https://cdn.shopify.com/s/files/1/0434/6671/9385/files/jebijuxozilo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7015/3113/files/50307112595.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_off0000676e.bin
2b8807a86c4dc9098ad951b9bedd5b43400b611438ad132ed3531d6ce83a2236		 pdf-font-stream PDF embedded font (sfnt) at offset 0x676E 5524 bytes
font_01_sfnt_off00007a0f.bin
57586a87609db742c1fb1362fab6b6caf117849593ed40ff425d9145d215313f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0F 10616 bytes

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