Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47bb92b84d764d2…

MALICIOUS

PDF

40.2 KB Created: 2020-09-01 07:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: baef8ea3f98837c36f5e8b67a0ff2560 SHA-1: 0a8dcb26fe1a22be7b166a7b74cda86fb6994885 SHA-256: d47bb92b84d764d234cd1d8dca0fe6125d4f8752bb24bb42da6c305547829904
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=how+to+group+sheets+in+excel+2013'. This URL is presented within the document body, disguised as a search result. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, suggesting a tactic to distribute or mask malicious links. The ML classifier strongly flagged this PDF as malicious.

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.com/wix?keyword=how+to+group+sheets+in+excel+2013
    • https://static.usrfiles.com/ugd/b8c837_6c4be4313a44495b99655cff6b94bfca.pdf
    • https://static.usrfiles.com/ugd/91e123_a43848f749794287b91d279579e45f35.pdf
    • https://static.usrfiles.com/ugd/e5a943_667394e56f9c48b899a740850ebc04cd.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/active_and_passive_voice_worksheet_grade_8.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/basumisafujuman.pdf
    • https://cdn.shopify.com/s/files/1/0435/6312/2843/files/fundamentals_of_fluid_mechanics_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2500557594.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/no_sleep_till_brooklyn_tab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78108387577.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/tasowerimetew.pdf
    • https://static.usrfiles.com/ugd/384ea4_385d0e3d23c6409796172a3680ea6bfc.pdf
    • https://static.usrfiles.com/ugd/4b874d_a33efe6a43974893aabe7ff3c2227100.pdf
    • https://static.usrfiles.com/ugd/3fc21f_f3a46d3ee61d4deb888ba863b86f65fe.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_off00005db2.bin
d6fd27ba24dc2abaf79191e3aafc212cd2d341ef2a0c2de91f30c791484033f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB2 5596 bytes
font_01_sfnt_off000070e3.bin
c01abd51fbe58674da1edee49322f747bc20e4455d93b4ec70d1a61d7ae464d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E3 10316 bytes

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