Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eeec82f42033421…

MALICIOUS

PDF

39.6 KB Created: 2020-08-24 15:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78b802aace90e01c4fae76d0a6c3d9c3 SHA-1: ee9f5d93a35327ad8c7f8e1a65b29697fbae985f SHA-256: 4eeec82f4203342111da29a72ed3e86b4a97ff7baccf3875e65f63affd1b878c
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=handwriting+worksheet+cursive+pdf'. This indicates the document's primary purpose is to redirect the user to a malicious site. Additionally, a large number of external PDF links were found, suggesting a link farm or SEO poisoning attempt. The presence of a visual download button further supports a lure-based attack. No scripts were extracted, but the embedded URLs and redirector link are sufficient to infer a malicious intent.

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.cc/pify?keyword=handwriting+worksheet+cursive+pdf
    • http://monajok.the-beaver-house.com/uploads/1/3/2/6/132682646/jaxuzuvutelifujizis.pdf
    • http://nozajet.jampireproductions.com/uploads/1/3/0/8/130814423/1392673.pdf
    • http://files.victoriachampionart.com/uploads/1/3/1/3/131383462/0315ad3c40e.pdf
    • http://files.1minutetomidnight.net/uploads/1/3/1/0/131070212/635320.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0624/files/low_platform_bed_frame_queen_ikea.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/vakijago.pdf
    • https://cdn.shopify.com/s/files/1/0437/4170/8437/files/design_process_in_architecture_from_concept_to_completion.pdf
    • https://cdn.shopify.com/s/files/1/0438/5187/4466/files/megafitazedikumadopepap.pdf
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/difference_between_inductive_and_deductive_method.pdf
    • https://cdn.shopify.com/s/files/1/0434/4558/4033/files/sew_what_pro.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/gudise.pdf
    • https://cdn.shopify.com/s/files/1/0439/6030/3774/files/emulator_nexus_5_android_studio.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/lekezomexuzemojowuloga.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_off00005c6a.bin
affc301762834b64253eb8f3008f1937a02f01b15cdb3ff32e542be8dcd2bf31
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6A 5564 bytes
font_01_sfnt_off00006f6e.bin
90375a7c439173221c79b37cb1d244f70ce075d5d834c50abb2e5f67a1311b14
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6E 10228 bytes