Malicious PDF — malware analysis report

Static analysis result for SHA-256 38cb66cc4da02c91…

MALICIOUS

PDF

48.4 KB Created: 2020-09-01 18:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14bdd93a7cfece3505f091f255477781 SHA-1: 5b2cbd5eca0736956320ec60b848edf5cbe84544 SHA-256: 38cb66cc4da02c9102a5b2c76aa29fbff3d3c24b6afb9e2aee6b988e075440e5
136 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised as a payment terms agreement template. The document body, though heavily obfuscated, contains the URL and keywords related to payment and agreements, reinforcing the lure. The presence of a link farm further suggests an attempt to manipulate search engine results or distribute malicious content broadly. No scripts were extracted from this sample.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=payment+terms+agreement+template
    • https://cdn.shopify.com/s/files/1/0433/7578/8190/files/gumalojesovufires.pdf
    • https://cdn.shopify.com/s/files/1/0435/5715/9063/files/5607578488.pdf
    • https://cdn.shopify.com/s/files/1/0441/3505/5512/files/printable_bridal_shower_games.pdf
    • https://cdn.shopify.com/s/files/1/0440/3340/9174/files/assinatura_digital_de_documentos.pdf
    • https://static.usrfiles.com/ugd/ecec20_445ee57b2049430590ae1c61db8a4870.pdf
    • https://static.usrfiles.com/ugd/865d50_47b4e06fcdb64260916d27bfd8856512.pdf
    • https://static.usrfiles.com/ugd/f96b02_0a7c20de20c5426bb1a10a1c3a50792d.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3863/files/articles_worksheet_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/lajobuvufodovutituja.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/44969853860.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87294954422.pdf
    • https://static.usrfiles.com/ugd/7d21c0_c04dc7fcc06b4c24a990bb749aa12541.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffe18ebf45f244ad9de6b3ea605aeb29.pdf
    • https://static.usrfiles.com/ugd/fd3290_0bb1c5529ea34e81a7ed6e702ae73415.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/
    • https://static.usrfiles.com/ugd/865d50_47b4e06fcdb64260916d27bfd88

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ecf.bin
aedac9f074594303ee50a14fedb44b61c6ef79c20c54270c437c7948be5c850a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECF 5244 bytes
font_01_sfnt_off0000909b.bin
3b576be333699a60b57f380bb4e107c8afd199ecc2aac5ececb838cc78449c65
pdf-font-stream PDF embedded font (sfnt) at offset 0x909B 10792 bytes