Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c3fef613708dd8…

MALICIOUS

PDF

56.5 KB Created: 2020-08-04 15:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45b6c59ad1fb30806b1f7579b3e17dc0 SHA-1: 88e2d9bc75e3480959256a9adb4582cb869f5c41 SHA-256: 29c3fef613708dd87dbdc25039e56ccd1c0361bb91daaea77612e6adfea91c0e
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wb?keyword=hr%20recruitment%20and%20selection%20project%20report%20pdf', is designed to lure users into clicking it under the guise of a recruitment report. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The primary malicious link likely leads to a second-stage payload or phishing page.

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.cc/wb?keyword=hr%20recruitment%20and%20selection%20project%20report%20pdf
    • http://files.carryyoursunshine.com/uploads/1/3/1/4/131453294/veruxovu_latasalatifo_basokimiwaza.pdf
    • http://files.underpressurehomewashing.com/uploads/1/3/1/3/131384281/dbccc3742a584.pdf
    • http://giwabijo.adldpk.org/uploads/1/3/1/3/131384401/jobanumujusarobux.pdf
    • http://files.simplybprints.com/uploads/1/3/0/7/130739669/153d6739.pdf
    • https://cdn.shopify.com/s/files/1/0435/3867/7924/files/duxawowugafu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/18766865334.pdf
    • https://cdn.shopify.com/s/files/1/0427/9789/1751/files/lowovodizoluzibolin.pdf
    • https://cdn.shopify.com/s/files/1/0433/8499/5991/files/cancionero_cristiano_acordes.pdf
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/46278447190.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/89666649192.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/12839184905.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/gejusozasobisusenu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/tapawetexelugazosurezeba.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/aqualink_rs4_manual.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_off00009f8a.bin
6a7204e984f260033a967b2c8c96a31282953ff844c57d8148d4ecd182bb0b1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F8A 5340 bytes
font_01_sfnt_off0000b19c.bin
a8f171f94232be48690853d23c770c4b6a1f51fe96923a4f4be1eae2f69daf67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB19C 10396 bytes

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