Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50bcb19d76384eb…

MALICIOUS

PDF

48.0 KB Created: 2020-08-07 05:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e85b4ec27e5e1b392064719f24efd34 SHA-1: c29c86098621f45af64cbff797f45ac91d2a9f7b SHA-256: a50bcb19d76384eb14b3887bb7c31ad23aa2465557d2bff992e60971999d56a8
160 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to known malicious redirector infrastructure. The document body text, though heavily obfuscated, contains the same lure text as the malicious URL, suggesting an attempt to trick users into clicking the link. The presence of a password archive lure heuristic indicates a common tactic to bypass security scanning by encrypting the actual malicious payload.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=cctv+camera+dvr+installation+pdf
    • http://files.udistrict.micromemphis.com/uploads/1/3/1/0/131070374/tekimep-tilapuwesut.pdf
    • http://files.p4partyproductions.com/uploads/1/3/0/8/130874652/0c3d417e46.pdf
    • http://files.shaneproductions.com/uploads/1/3/2/6/132681391/gidabewarazu.pdf
    • http://files.davidleakeesq.com/uploads/1/3/2/6/132681670/zurifif-besusuxuravix.pdf
    • http://files.monfortestatesdacula.com/uploads/1/3/2/6/132681002/226bb98.pdf
    • https://cdn.shopify.com/s/files/1/0431/0584/5397/files/forokafoxororazas.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/63940598448.pdf
    • https://cdn.shopify.com/s/files/1/0433/6300/8664/files/viralaxibokaxisulus.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7702/files/45725249464.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/nupoxugewezevipa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/keline.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/webevabup.pdf
    • https://cdn.shopify.com/s/files/1/0431/8144/1181/files/cursive_alphabet_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5621/files/78018315745.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3302/files/72684601302.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_off00007e03.bin
0ec5d23ed7539088bf74d5f2f0cfe5af7da02b8d51d0474286ba0898635e2516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E03 5264 bytes
font_01_sfnt_off00008fd7.bin
c286f9f03df58e705d783915f647f230aa4f97d3baa27c2d99da2bbae1eba2e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD7 10420 bytes

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