Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59e0653f51f88e2…

MALICIOUS

PDF

57.2 KB Created: 2020-08-24 16:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5890e0c1ef970752644e31891b45d3cb SHA-1: 49399dbf7a09a1b373171ea7fa685791dda65dcf SHA-256: b59e0653f51f88e2b2b3a5296f03deb54e0fafd5105a5a10867e956640fb884f
128 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment T1071.001 Web Protocols

The PDF contains embedded JavaScript and a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it redirects to malicious infrastructure at 'ttraff.cc'. The document also exhibits PDF_SEO_LINK_FARM behavior, with numerous links to external PDFs, likely to obscure the malicious redirector. The embedded JavaScript stream is a common technique for initiating malicious redirects or further payload delivery.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=carbonic+anhydrase+enzyme+forms
    • http://files.stgabrielschool.org/uploads/1/3/2/6/132682134/ed1088b7f0.pdf
    • https://cdn.shopify.com/s/files/1/0434/0862/1719/files/lorudobebusol.pdf
    • https://cdn.shopify.com/s/files/1/0430/5371/1513/files/fci_answer_key_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1927/9258/files/anthology_short_stories.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/81057006338.pdf
    • https://cdn.shopify.com/s/files/1/0433/4131/6264/files/epidemiologia_descritiva_e_analtica.pdf
    • https://cdn.shopify.com/s/files/1/0437/7971/9330/files/mysql_show_databases.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/mesekolirakuporukira.pdf
    • https://cdn.shopify.com/s/files/1/0428/8479/2479/files/61896798897.pdf
    • https://cdn.shopify.com/s/files/1/0432/8148/1884/files/ambrose_bierce_a_horseman_in_the_sky.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/67671969271.pdf
    • https://cdn.shopify.com/s/files/1/0436/1607/5939/files/iron_deficiency_anemia_guidelines_acg.pdf
    • https://cdn.shopify.com/s/files/1/0437/6104/1569/files/bass_guitar_headstock_templates.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/the_guess_who_greatest_hits.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/reference_letter_for_immigration_marriage.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c36.bin
033b9a8b04260ce44b2990f0fca6d2a74ea6de9bdbda306117b16586084f26ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C36 5428 bytes
font_01_sfnt_off00009e84.bin
4d6134e47ca919f1951fe2e62234ea9280e09a44795e3f40236fdaab617c9eb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E84 10412 bytes
font_02_sfnt_off0000c252.bin
4c54dab39351e9f588264fb40295412c1699e9dbfeab0fcfc4ed1d68980be3d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xC252 16168 bytes