Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6335c07d4dea0e5…

MALICIOUS

PDF

48.6 KB Created: 2020-07-16 16:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 960f6c79e6d0b452602717c4107f88b1 SHA-1: 2ba9c14654a4a69fb7ba20e73e7a1ba53d7c5c30 SHA-256: c6335c07d4dea0e55bccbb3079a3923a4874f81024d7ef5b1055546ca12a781b
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, appears to be related to search terms for 'Cours vba excel 2016 pdf', suggesting a lure to a malicious site. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of a link to malicious infrastructure.

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/wb?keyword=cours%20vba%20excel%202016%20pdf
    • http://files.artizendesign.co.uk/uploads/1/3/0/7/130775515/6272622.pdf
    • http://files.mackbuildltd.com/uploads/1/3/2/6/132681823/zeriwitelozawu_kosipibufonani_penus_kewopefagefeb.pdf
    • http://files.goatclean.com/uploads/1/3/1/0/131070920/podizotavese.pdf
    • http://files.ak4h.org/uploads/1/3/1/8/131857120/weguran_dolug_wonanonuxepupu_lanapizod.pdf
    • http://files.slikslymusic.com/uploads/1/3/2/7/132712003/panumewowimozin_nevegapexosix_karapo.pdf
    • http://files.goatclean.com/uploads/1/3/1/0/131070920/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jobevemavesofidubuxiwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12584167006.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2150/files/26990087226.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76222514852.pdf
    • https://dexamax.files.wordpress.com/2020/07/kigesigufuzuvenabomu.pdf
    • https://vukomalej.files.wordpress.com/2020/06/79694902355.pdf
    • https://lobubun.files.wordpress.com/2020/07/52836514228.pdf
    • https://rugemafo.files.wordpress.com/2020/07/13350562194.pdf
    • https://gozulij.files.wordpress.com/2020/07/narogomidiwufa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/5787218168.pdf
    • https://cdn.shopify.com/s/files/1/0434/0813/0197/files/87104715077.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/valuvakebagafekod.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/dulinesulijakivarirodu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/88888863248.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9715790575.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_off00007b05.bin
614601114bea3bf70892d77a039af6cf1fddad2b0008b07ffa8a96a2b2a6b632
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B05 5568 bytes
font_01_sfnt_off00008e16.bin
6e7f55a1a3a8d1faa6053c38f9c615ec810320e58409217733c48fbc279ca9d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E16 11612 bytes