Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc49287c927309d…

MALICIOUS

PDF

40.6 KB Created: 2020-09-03 01:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a812591cd3521bd9c0bc963e04a75260 SHA-1: 3a16d2cc20973dc996f60687ed55af9562bf322f SHA-256: 9fc49287c927309dab3f27a9ef5c40317a5c0d8835b62e8740cfc3a3ca738a41
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=que+significa+movimiento+uniforme+acelerado'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, one of which is 'https://static.usrfiles.com/ugd/32777b_bf99705ed75e4bd4b78a1b81359e8fd4.pdf'. The ML classifier also flagged this PDF with high confidence. The document body, though partially corrupted, contains the same redirector URL, reinforcing its malicious intent.

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=que+significa+movimiento+uniforme+acelerado
    • https://static.usrfiles.com/ugd/32777b_bf99705ed75e4bd4b78a1b81359e8fd4.pdf
    • https://static.usrfiles.com/ugd/b916f4_5d3ecd084d054d30b54dbdebecaf0399.pdf
    • https://static.usrfiles.com/ugd/314c35_30717b93e5d942fa9adb2f81eeb9e972.pdf
    • https://static.usrfiles.com/ugd/ced2dc_9f8440da458a4868bc904c08eef85073.pdf
    • https://cdn.shopify.com/s/files/1/0434/6200/0806/files/688500525.pdf
    • https://static.usrfiles.com/ugd/e643da_87f0eada18094001be4bf888053d3ab3.pdf
    • https://static.usrfiles.com/ugd/b8c837_89d332af4a29486188fe47c5a757534d.pdf
    • https://static.usrfiles.com/ugd/0f5b72_c0847c0c9abc4ff1bdf8ac26af1d3b80.pdf
    • https://static.usrfiles.com/ugd/b97cba_bd815025f274407dbc74f848c03cb5a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_eaf3340ce393431a8cf9bcce220e30dd.pdf
    • https://cdn.shopify.com/s/files/1/0440/1391/2222/files/quarter_past_midnight_bastille.pdf
    • https://cdn.shopify.com/s/files/1/0435/2642/2687/files/fupezebat.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_off00005c2f.bin
cf8939b340ee0ee07640fee5e4bbb89514d4e686e1f25c8515fdc27abeeba676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2F 5464 bytes
font_01_sfnt_off00006eba.bin
e24f6aec8af2e7e8aed5b8f81c96273ab2778cda9aea5c9173947cbbdd1cfdd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBA 11040 bytes

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