Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af76d55423dc5f8…

MALICIOUS

PDF

48.1 KB Created: 2020-08-29 00:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44846e94335a0bc3e1191bd8cf4b236e SHA-1: dc316064c7a4e4bd8f7d2c075fe4ae91148075f8 SHA-256: 3af76d55423dc5f8219884f23993ce99392feab89345664d43003bc4464b040e
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious link, 'https://ttraff.cc/wix?keyword=s%25C3%25B6z+sanatlar%25C4%25B1+benzetme', is flagged as a redirector to malicious infrastructure. The document body appears to be malformed or obfuscated, but the presence of numerous links strongly suggests an attempt to lure users to external, potentially harmful, sites.

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/wix?keyword=s%25C3%25B6z+sanatlar%25C4%25B1+benzetme
    • https://cdn.shopify.com/s/files/1/0465/0201/9230/files/infection_prevention_and_control_nice_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4737/files/juxozuruxonuxom.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/97900076476.pdf
    • https://cdn.shopify.com/s/files/1/0434/8208/7588/files/wisuwemokesef.pdf
    • https://cdn.shopify.com/s/files/1/0432/3491/8558/files/32960899764.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodupenewizaf.pdf
    • https://static.usrfiles.com/ugd/b8c837_53b0291f9c78495bab1a7d9d37955ae1.pdf
    • https://static.usrfiles.com/ugd/b8c837_680cec348eef439dabd0a506550f8eb2.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7b99b6464864c338379f84ed86d63f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_614dab093aae428c81c5799293fc0278.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3c80b63c2ef4ff095a3c9af6a0180b5.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/lacrimosa_fantasma_dela_opera.pdf
    • https://cdn.shopify.com/s/files/1/0429/0481/3721/files/wufedejufobofad.pdf
    • https://cdn.shopify.com/s/files/1/0459/6573/8151/files/mini_cricket_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/7909/7758/files/nidiwozobisoforiweko.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_off00007428.bin
63e399c0a8b71ce84d8b26420c0e2db91d6ad0376736596eee0377d8f5ba1f3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7428 5292 bytes
font_01_sfnt_off000085d3.bin
e529ac3bd3e634d85946381fb8c8cb533aeff2133995eb1a0c18131d40e6267b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85D3 15124 bytes

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