Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9cbb24749eb8d6e…

MALICIOUS

PDF

65.0 KB Created: 2020-09-01 10:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8a41f3dc4e8215ac613c9cc5bf3a4c9 SHA-1: d3bdbf9589a322ba968936de9d9e015c62e65784 SHA-256: f9cbb24749eb8d6e058374131db1e780b847eb07787b408091844c2f445be51d
150 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with one URL pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a phishing site or download further malware.

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=anatomie+de+la+main+pdf
    • https://static.usrfiles.com/ugd/b8c837_c2fb51372f29401490b51c546366477a.pdf
    • https://static.usrfiles.com/ugd/e6092c_269aca38ca014934afaac3073954464a.pdf
    • https://static.usrfiles.com/ugd/5ad03d_6eed3e4da129403587fb1aec1a07680e.pdf
    • https://static.usrfiles.com/ugd/83f04e_ce8ce50edb854965872c5378fce12ec6.pdf
    • https://static.usrfiles.com/ugd/22739b_823a5949cce54020afb378ea98e58885.pdf
    • https://cdn.shopify.com/s/files/1/0429/8460/3801/files/56769768407.pdf
    • https://static.usrfiles.com/ugd/760101_86185de0271f446f98d2c0dc2c0e24d4.pdf
    • https://static.usrfiles.com/ugd/9ec29b_05d27305a2704cc2afab70e15968eecc.pdf
    • https://static.usrfiles.com/ugd/10b11f_67f756a1afb54d54b851d176a58c95e4.pdf
    • https://static.usrfiles.com/ugd/a43ec6_a97bac20e3134b3b80f33ebcc908412a.pdf
    • https://static.usrfiles.com/ugd/edb4a7_6604185db7c7443382142e543c84f6c5.pdf
    • https://static.usrfiles.com/ugd/3e87bf_7bc723aeb42843538a81bb52260af067.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a3c6d57076f463d98f0857f0535287a.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b044.bin
c5bd8ccdae27143c6c8feb1a47f55c72c451903c82460e5df2e3506c06421a98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB044 4692 bytes
font_01_sfnt_off0000c01b.bin
8d4b3aa88a38184ed80f6a5744eaadee55528e3063a64928a1a815b2a4e9a472		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC01B 12672 bytes
font_02_sfnt_off0000e768.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE768 4324 bytes

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