Malicious PDF — malware analysis report

Static analysis result for SHA-256 a55eda39975da1b6…

MALICIOUS

PDF

40.0 KB Created: 2020-08-14 22:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ec53535817694b672523c9e20a3a3d7 SHA-1: 2dbd129dd446bd20cf321f24443a045552f69c7a SHA-256: a55eda39975da1b683a08faf79e8c923f0e1fc6cbed769873e4e3133d3d47d22
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure related to resume templates. The primary malicious IOC is the redirector URL, which is used to obscure the ultimate destination of the malicious payload.

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/pify?keyword=example+resume+template+word
    • http://fariwosi.effectivemortgage.com/uploads/1/3/1/1/131164250/gadamikikumisiw-mosifunipu-pewesepa.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5503/files/29252946534.pdf
    • https://cdn.shopify.com/s/files/1/0437/6199/1841/files/51852552754.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/vetevasewosimoganupipe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mutim.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/3456375578.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7118/files/arrow_s05e22_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0436/4976/1433/files/e._coli_in_urinary_tract_infection.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/47994193515.pdf
    • https://cdn.shopify.com/s/files/1/0437/6884/0341/files/45710355494.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/wuliw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/39376753620.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_off00006086.bin
7e83558f1c709ac333be1fc53e30942503358c98a1f9d356e232251e88218a9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6086 5220 bytes
font_01_sfnt_off00007248.bin
80c1bf33519c42af521ac1e268b580e7799f7c738480cb914d5a1a33e4518244		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7248 9792 bytes

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