Malicious PDF — malware analysis report

Static analysis result for SHA-256 78df68c46266a11b…

MALICIOUS

PDF

50.8 KB Created: 2020-08-18 14:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba04f343ced2a6e60c6c2662c58b16a7 SHA-1: eacb55db7d93423d0cc1c8dbf917cc44f3a13c8e SHA-256: 78df68c46266a11b913d5d6fa9caa0ae908993df6be8240a8294db61eeaf0649
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, including a known malicious redirector at 'https://ttraff.cc/pify?keyword=8.+4+angle+relationships+answers'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, suggesting an attempt to manipulate search engine results or distribute malicious content. The presence of a password-protected archive lure heuristic suggests the document is intended to trick the user into downloading a password-protected file, likely containing a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=8.+4+angle+relationships+answers
    • http://files.behrendcounseling.com/uploads/1/3/0/8/130814644/06d28.pdf
    • http://files.lynncoc.org/uploads/1/3/2/6/132695280/fumefu-jujibaxojuku.pdf
    • http://biwagiz.conflictchange.com/uploads/1/3/2/8/132814930/mutid_zebarobefoki.pdf
    • http://files.fleurdetucson.net/uploads/1/3/2/6/132682929/lawojafodane.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1605/1112/files/wedasopisuwobipew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69696378660.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8455/files/logical_reasoning_questions_and_answers_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2078/7613/files/ana_catalina_emmerick_visiones_y_revelaciones_completas.pdf
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/lenudevezobimameximem.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/62867466817.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/wireless_cctv_camera_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/6078/1465/files/56005260838.pdf
    • https://cdn.shopify.com/s/files/1/0434/4902/4679/files/boundaries_cloud_townsend_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5167/9898/files/gidonline-_kino._ru.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008808.bin
faa216f112ab1a8d0a51bcd6b2df4d7267ed373f96325bcb42c5524f2ea6d41d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8808 5392 bytes
font_01_sfnt_off00009a6d.bin
f9fd047aeb56ed686da22c2ff9357d982d75a0ec76c7addb3686e044ab6ff4e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6D 10524 bytes

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