Malicious PDF — malware analysis report

Static analysis result for SHA-256 9029ddbe0345f936…

MALICIOUS

PDF

44.3 KB Created: 2020-08-29 18:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4072ffdc80b80491df283a7fcb0d5ae SHA-1: 6a03fbabc64f8fef9e1a3a73fa39c99f1232702e SHA-256: 9029ddbe0345f9365cc8f8de87795303acb94afa837e615a7907053e8a35baa1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link 'https://ttraff.cc/wix?keyword=desarrollo+de+base+de+datos' leads to known malicious infrastructure. The 'PDF_SEO_LINK_FARM' heuristic suggests a large number of external links, likely intended to obscure the malicious destination or for SEO manipulation. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector is sufficient to indicate a likely phishing or malware delivery attempt.

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=desarrollo+de+base+de+datos
    • https://static.usrfiles.com/ugd/b8c837_ad9832d2efd24c09924b5cce1a436411.pdf
    • https://static.usrfiles.com/ugd/b8c837_3849cf880a9d411e869eb4303ccdca74.pdf
    • https://static.usrfiles.com/ugd/191a6d_f33f0b3d4b1f4dd5b221a5505d8aed6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b3ccff3355c4b72882e361250503326.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0fc3ebefc6d468abcf5a8a2e0acd464.pdf
    • https://static.usrfiles.com/ugd/b4a829_8d71171bbdfc41d4bdee423c8f0e044d.pdf
    • https://static.usrfiles.com/ugd/b8c837_40b0e2f330ed48b687c04fd0fa65e47c.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/81419989920.pdf
    • https://cdn.shopify.com/s/files/1/0437/1474/0373/files/79209753136.pdf
    • https://cdn.shopify.com/s/files/1/0434/7687/7478/files/63848587560.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lorirazapevimixawas.pdf
    • https://cdn.shopify.com/s/files/1/0439/2163/7544/files/android_led_detroit_become_human_cosplay.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_off00006c02.bin
6961bcfba02b3d2e1d5c15ea28d1f304ab664ea89ad7dba7a699d56e5c316d81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C02 4960 bytes
font_01_sfnt_off00007ce4.bin
e49427b4c72042c59735bd1dd68180d764eac9d6757ae7e1fbd6fff9a97902d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE4 11644 bytes

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