Malicious PDF — malware analysis report

Static analysis result for SHA-256 997504ebbf53478b…

MALICIOUS

PDF

58.5 KB Created: 2020-08-31 22:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8c3440c0c5a4a7adfb5f4fdea5c3ee0 SHA-1: 649efef170e7f209800e3ec07fc891179c486c55 SHA-256: 997504ebbf53478b0d1969a276b06842245bbab23687a64f868d6ee422364464
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One such link, 'https://ttraff.com/wix?keyword=animals+song+video++maroon+5', is flagged as a known malicious redirector. The ML classifier also strongly indicates maliciousness. The document body is heavily obfuscated and appears to contain junk data, but the URL is clearly visible within the obfuscated content.

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=animals+song+video++maroon+5
    • https://static.usrfiles.com/ugd/b8c837_acba72f8c18149d89a5f6b0bc257f69b.pdf
    • https://static.usrfiles.com/ugd/8b9728_cfd76597a13144309565f0ae351d559f.pdf
    • https://static.usrfiles.com/ugd/9e53d4_39231d37eb1e4107acc6d71cc7cff5a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_be3b6c19ec5842778bde5634da6edbf4.pdf
    • https://static.usrfiles.com/ugd/5360f8_f5e0e4f3ae7b404c833699fce5124bfd.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1780/files/pantangi_o_pambalana_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/zesibekegapagixesumuvida.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/wisufif.pdf
    • https://cdn.shopify.com/s/files/1/0437/9056/5537/files/skyrim_se_how_to_run_reproccer.pdf
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/fularaximumovigi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8071/2346/files/25203535444.pdf
    • https://cdn.shopify.com/s/files/1/0429/9777/6543/files/xurumajaju.pdf
    • https://cdn.shopify.com/s/files/1/0460/1970/7047/files/brescia_house_school_uniform.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_off0000987a.bin
5b9ef40df491a9e02393512a22f967cc7bd0220f85b4fb1f9b7c342a63c3dba0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x987A 5316 bytes
font_01_sfnt_off0000aa79.bin
a5744267a5650fcc671547224e516e365a20b4e5198bd9ed25e20a310b856ff3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA79 16296 bytes

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