Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fec9e5d0d5d5f6e…

MALICIOUS

PDF

60.9 KB Created: 2020-08-18 13:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9610ff6ecf8d26bd22d117c76a820b78 SHA-1: f992e1e9e181eb4309a3b8bdda007af53daa451a SHA-256: 4fec9e5d0d5d5f6eca737abc7822d63529ac89531393cba6b128aed830e818c9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a mass of external links, including one to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'free prenuptial agreement template word' and the malicious URL. The primary attack vector appears to be a social engineering lure to trick users into clicking the malicious link, which is then used to redirect them to further malicious content.

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=free+prenuptial+agreement+template+word
    • http://files.vtxbts.com.au/uploads/1/3/0/8/130874284/numap-narenifegopir-guravofeja-gemukesotepazal.pdf
    • http://files.lyrikalstorm.org/uploads/1/3/0/7/130740033/4245065.pdf
    • http://files.amadauniversity.com/uploads/1/3/0/7/130775084/tikefowofoletuw.pdf
    • http://files.socialdistancingwiththeriggs.com/uploads/1/3/0/7/130775046/vasomopat.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/nikidavexamejazanozeveme.pdf
    • https://cdn.shopify.com/s/files/1/0432/5641/4363/files/vcredist_x64._exe_2005_sp1.pdf
    • https://cdn.shopify.com/s/files/1/0432/7355/2028/files/4717904542.pdf
    • https://cdn.shopify.com/s/files/1/0430/8202/3061/files/kagavabakubojesuzibaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/malinowski_contribution_to_anthropology.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/vibiwawimolatapagufib.pdf
    • https://cdn.shopify.com/s/files/1/0435/3179/6632/files/tamil_astrology_birth_chart_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/3296/7318/files/22838830227.pdf
    • https://cdn.shopify.com/s/files/1/0436/1895/9523/files/fuluxen.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4872/files/badolasenomuxilig.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_off0000a6c9.bin
531894822a7c2b3c8532933fe3b1426bd0e66e4f09f42dab0a7b9d6a549d9830		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6C9 5148 bytes
font_01_sfnt_off0000b841.bin
18673d25c09f871c51adb5698f6060c088e56a889935a4ddcdc7630ded71686b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB841 15028 bytes

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