Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d423941a5936765…

MALICIOUS

PDF

45.6 KB Created: 2020-09-02 17:12:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba3efa627af3cd0fa7a99bf21c99702d SHA-1: 3cb2a23d34b78476217343e787bcb7d348d02242 SHA-256: 2d423941a5936765ba21151b66f4e6af12e82082a5cf8d464fa9b6673bbf2660
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. This URL is presented to the user within the document, likely as a lure. The document body, though partially corrupted, contains the same URL, reinforcing its role in the attack. The presence of numerous other links, many pointing to 'static.usrfiles.com', suggests a link farm or redirection strategy to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=dota+nyx+assassin+guide
    • https://static.usrfiles.com/ugd/b8c837_dcda7f008e8440789679917b9cda487e.pdf
    • https://static.usrfiles.com/ugd/3826db_720b724b389543c59eb606c43055c9fa.pdf
    • https://static.usrfiles.com/ugd/078c79_019aef32f0b948b0b3188a44f8196ebf.pdf
    • https://static.usrfiles.com/ugd/097bd5_7e8e10d9a97d433eab333404dcb31780.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/cours_sur_l_tat_de_rapprochement_bancaire.pdf
    • https://cdn.shopify.com/s/files/1/0433/6189/4565/files/makafasovulanokoxufo.pdf
    • https://static.usrfiles.com/ugd/b8c837_f813b776b3b2450196a554948a86c5eb.pdf
    • https://static.usrfiles.com/ugd/21e6f2_5ece1e2b89b64fe7bff87cbb15d4d378.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8db61c4f5e14e4f851e78469309912c.pdf
    • https://static.usrfiles.com/ugd/7041e4_264a3a7b53374fe5a59d1a819e483aa4.pdf
    • https://static.usrfiles.com/ugd/95bb70_c4fb25b6157c434d88b9d7bf05e00b88.pdf
    • https://static.usrfiles.com/ugd/285be4_4674795d637747e7be273452dde6fde0.pdf
    • https://static.usrfiles.com/ugd/b50c55_1e70781f0c0c4403b537fab900c1420c.pdf
    • https://static.usrfiles.com/ugd/078c79_578bc39dac8e48f4808765445f4c6b58.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_off0000748a.bin
866d1636d583e82ac3781fa7b5ea19303782462ac9909b494aa2f68a2081ab09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x748A 5036 bytes
font_01_sfnt_off000085d7.bin
43a1f74ee52882fa73713a7ae035aecd7cc73fc90bcc5ec158beb2e911112604		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85D7 10492 bytes

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