Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a9255767ac84722…

MALICIOUS

PDF

39.4 KB Created: 2020-08-01 07:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c9eafed46ea9df5353f9a3f0c9e644e SHA-1: 4f40b4b8ff8b4b87325aa1865902424203705927 SHA-256: 1a9255767ac847227bc30f5108aa135d2f61b789d7daae120e8418372a9fc98d
200 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one link pointing to a known malicious redirector infrastructure at 'ttraff.ru'. The document body also contains text related to 'webmail' and 'payment redirection', aligning with a business-email-compromise (BEC) lure. The presence of a password archive lure suggests the document is intended to trick the user into decrypting and accessing a subsequent malicious payload.

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.ru/pify?keyword=webmail+wfhc+org
    • http://files.tlgconsultingvt.com/uploads/1/3/1/4/131438176/kapixisemapuxaxude.pdf
    • http://files.bespokebewitched.co.uk/uploads/1/3/1/4/131408170/vobovinaga.pdf
    • http://files.umvotibeans.com/uploads/1/3/2/3/132303035/buvowu.pdf
    • http://files.ahaecker.com/uploads/1/3/1/8/131856131/jofelaxos-jatonemo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/18565122733.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/61224018244.pdf
    • https://cdn.shopify.com/s/files/1/0434/3853/8904/files/54969616362.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/9459073165.pdf
    • https://cdn.shopify.com/s/files/1/0429/5173/7498/files/9647233913.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/95604242458.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tawoxusabevesumaxev.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/jejizonupuligenupibikati.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/sexonof.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5502/files/73571404787.pdf
    • https://cdn.shopify.com/s/files/1/0433/5838/8383/files/sixumuvaxadepasuku.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_off00005d68.bin
2bb0f2bd1c7070e452ef89e6af050ce3411ed4c83bfea6ed6cbd76b90372e9b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D68 5364 bytes
font_01_sfnt_off00006f93.bin
afb52b7e1c351e881693462438a01d70e0f220566354b3e6bd938d3b88566cbc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F93 9796 bytes