Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a5b35f66720725…

MALICIOUS

PDF

47.8 KB Created: 2020-08-25 04:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 785abc78229c218ea92d3d62533100b1 SHA-1: 9d5d72478315b54c3bf9b55c71610122a530416d SHA-256: 37a5b35f66720725227be37de85d9ec432d25bc6c543bb83f5a63f986c97ccfc
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Excel sheet working hours' and includes the malicious URL, suggesting a social engineering lure. The presence of a link farm further indicates an attempt to distribute malicious content.

Heuristics 3

  • 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 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.com/pify?keyword=excel+sheet+working+hours
    • http://files.kc-phramez.com/uploads/1/3/1/4/131453998/xolexenolulemuk-dobaxu.pdf
    • http://govamam.interdynartis.com/uploads/1/3/1/4/131437502/xepeduwipo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0034/7299/files/accounting_information_system_book.pdf
    • https://cdn.shopify.com/s/files/1/0441/0913/6024/files/letetevesafakavegubu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/86579964148.pdf
    • https://cdn.shopify.com/s/files/1/0459/8982/2631/files/crystal_report_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0429/0517/4183/files/podirubapurokeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/45484671803.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/89397105376.pdf
    • https://cdn.shopify.com/s/files/1/0457/8669/3798/files/formation_windev_17.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/deduzizarijaxojera.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/papural.pdf
    • https://cdn.shopify.com/s/files/1/0436/1755/0499/files/40668052937.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_off00006927.bin
b6071c68230941909876c38f2ccd6975d771910b22ec8d33e94043b4be85979d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6927 5032 bytes
font_01_sfnt_off00007a57.bin
954d8bf67c979e06ff6dafff4f3e52f33e6646502cad61264b7e753b5f2069f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A57 10008 bytes
font_02_sfnt_off00009cd8.bin
f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD8 16144 bytes

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