Malicious PDF — malware analysis report

Static analysis result for SHA-256 20fb503f2d5e0ba8…

MALICIOUS

PDF

41.5 KB Created: 2020-08-22 14:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b20837b0d5225c0b3e9b795da949310 SHA-1: 0611ae97b90b614f48210a7bfd506f326223ea59 SHA-256: 20fb503f2d5e0ba8e347036fdb12600c738e597d433d201638f5e08447895b38
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The document body is heavily obfuscated but contains a reference to the malicious URL. The primary purpose appears to be SEO manipulation or hosting a link farm, potentially to distribute 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.com/pify?keyword=activity+transition+android+example
    • http://files.sassypantsfashionboutique.com/uploads/1/3/2/6/132696506/lewag.pdf
    • http://bogur.blairboosters.org/uploads/1/3/1/4/131454029/kopaforizer-venuxesavuju-xalejukamavewes.pdf
    • http://xojire.michaeljperkinsschool.org/uploads/1/3/1/4/131437626/035437631ecce9.pdf
    • http://tixenazo.passionforsoulsministries.org/uploads/1/3/1/1/131164250/6907983.pdf
    • http://files.adglresources.com/uploads/1/3/2/6/132682833/12705812446a.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1767/files/tomevigukepekapigekowal.pdf
    • https://cdn.shopify.com/s/files/1/0440/1332/2398/files/setadedawuridagowagus.pdf
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/wojenotukiziwitegagimali.pdf
    • https://cdn.shopify.com/s/files/1/0433/9168/0673/files/nokazepilitekeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/6480/2982/files/gisazi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5388/files/xutenonako.pdf
    • https://cdn.shopify.com/s/files/1/0430/5341/6601/files/conversions_worksheet_physics.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5591/files/defending_azurewing_repose.pdf
    • https://cdn.shopify.com/s/files/1/0431/8042/5370/files/juromusiwutivasuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/big_lottery_fund_full_cost_recovery_spreadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/9509/5451/files/52487838138.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_off00005d53.bin
abfde89f21732594be02f9c23269eebeac7239c9825ecb1cee73c110fb35f14e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D53 5436 bytes
font_01_sfnt_off00006fc0.bin
da337d76ce1ff1a6f6ce1b5d531dc94aba2c8cbb5b8f573271f539b81eea6842		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC0 12956 bytes

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