Malicious PDF — malware analysis report

Static analysis result for SHA-256 80af7ef03f63396b…

MALICIOUS

PDF

40.9 KB Created: 2020-08-30 00:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0326f1604f2a536c92de4e5c882e7a35 SHA-1: e8eb8f8252163ae0c5e2c460ab98653186de70a0 SHA-256: 80af7ef03f63396b31e9ba0e1c0ff98e6aadff1ee7a1992f770ec222ccaf5e83
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.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to malicious infrastructure via the embedded link.

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=ac+optoacoplador+de+entrada
    • https://static.usrfiles.com/ugd/3e87bf_d7bf4da1877e42d7a3a8a85ca886d718.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b208a5f96604492a66c1ac05f9d89cb.pdf
    • https://static.usrfiles.com/ugd/d54300_41b2d949c56141c591ccb4dff7aea521.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/lejatipa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/beamforming_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0453/8567/9016/files/automata_theory_computability_and_formal_language.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/51985593393.pdf
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/wefenelalesevuvenor.pdf
    • https://static.usrfiles.com/ugd/b8c837_441bc173269a423b8cc0cf9aab728601.pdf
    • https://static.usrfiles.com/ugd/b8c837_719d18d9966241149a2088d927488284.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_off00005f4f.bin
ea496d9100748093a1b04e9456c8dac98fae8172d04cd25b17873baf94341501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4F 4880 bytes
font_01_sfnt_off00006fe6.bin
e2446df756da5b39253b74ae1c3194b1d768596f5eb06fedd5fc9e5114af5f24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE6 11600 bytes

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