Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ac0b7fcd4ece6e…

MALICIOUS

PDF

39.9 KB Created: 2020-08-27 18:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04ba036a1915e4fd87342cedcc270128 SHA-1: 7b33352cc8f9078255a90fc9c9ec823b889240f5 SHA-256: c7ac0b7fcd4ece6e8e0957cae1302ad54272e76562fb4ff0e93dff18d0219498
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link to 'https://ttraff.cc/pify?keyword=libro+chindia+pdf', which is a strong indicator of phishing or malware distribution. The document also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to obscure the malicious redirect. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=libro+chindia+pdf
    • http://zalebefe.saltlakecountyjuniorlivestock.com/uploads/1/3/0/7/130738531/sopamawesexuf-fapakavo-latezuma.pdf
    • http://fakosusos.nlascouting.org/uploads/1/3/1/4/131437987/mokoj_xopaveduxa_kogabewodofu.pdf
    • http://files.adrienmatray.com/uploads/1/3/0/8/130813645/0f9ee8c2484.pdf
    • http://kukeda.priscillaventurablog.com/uploads/1/3/1/4/131438641/viraw-wuzerap-totiret-suritutaf.pdf
    • http://vapigupi.saintgregorysileby.org/uploads/1/3/1/3/131380934/kotebogisarisaf-folijoma-rojugizaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/1393/9110/files/74084938118.pdf
    • https://cdn.shopify.com/s/files/1/0429/4977/1430/files/redefaluwuferubad.pdf
    • https://cdn.shopify.com/s/files/1/0433/4508/4574/files/metokubakore.pdf
    • https://cdn.shopify.com/s/files/1/0434/4915/5746/files/african_history_file.pdf
    • https://cdn.shopify.com/s/files/1/0439/2720/8091/files/convert_xfdl_ke.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0285/files/career_launcher_cat_test_series.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/71550817870.pdf
    • https://cdn.shopify.com/s/files/1/0433/5616/0151/files/59986386148.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_off00005e2c.bin
8a2fc15a08e66f3dd628a113e673c17b5939e47abd5b641d85dc827f105a7dc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2C 5116 bytes
font_01_sfnt_off00006f82.bin
a88d7ecf7c3cb47d0d2c786cc4745fef5b165e3d38b23da821d6c9fb30f3d8b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F82 10424 bytes

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