Malicious PDF — malware analysis report

Static analysis result for SHA-256 9047be1449fad77d…

MALICIOUS

PDF

44.1 KB Created: 2020-08-29 18:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a136de8decb2bd38eac4cf21c4475617 SHA-1: f38facbfc3c0b967b4f243063835d0cbebc2917f SHA-256: 9047be1449fad77dd36652dfb1fa338f5a9c3465b495f34e3137a6a7caf423dc
150 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, which is a common tactic for delivering malicious content. The document body, though heavily obfuscated, contains the text "Tableau certification study guide" and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also contains a large number of external links, many pointing to the same domain, indicating a link farm used for SEO poisoning or traffic redirection.

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.cc/wix?keyword=tableau+certification+study+guide
    • https://static.usrfiles.com/ugd/b8c837_f3cef1cc23c247f3925f3d2d4387b180.pdf
    • https://static.usrfiles.com/ugd/5b9365_b18e0a7223f248d0b1b378fe6c2cd81f.pdf
    • https://static.usrfiles.com/ugd/b8c837_19d9407701564c2891419850f091e039.pdf
    • https://cdn.shopify.com/s/files/1/0428/7427/3948/files/duwunitavokitab.pdf
    • https://cdn.shopify.com/s/files/1/0459/9424/6303/files/38031877277.pdf
    • https://cdn.shopify.com/s/files/1/0430/7428/9813/files/rapov.pdf
    • https://cdn.shopify.com/s/files/1/0435/5512/7455/files/elevator_pitch_presentation_template.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/14406815647.pdf
    • https://static.usrfiles.com/ugd/b8c837_db9f3a9a24f44c1f9b25eea88cc6337d.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcc17a7272924eab8106535be1aeb6b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_f53a7745d4554776b9e0693b659158fc.pdf
    • https://static.usrfiles.com/ugd/1c90dc_77283e0fdbc04f1c8a94aa41d9adf4c2.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_off00006e90.bin
9f33cb7120212fd8921ce7b429d140f40cc811980882aa50c87419655dfbf721		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E90 5380 bytes
font_01_sfnt_off000080f1.bin
5742b17b6ec153bb682f8ad56630916000e3866c2ebac3d568e28a61aba5a055		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F1 10120 bytes

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