Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc88999cb3f078e…

MALICIOUS

PDF

46.3 KB Created: 2020-08-06 09:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65de742d86a96aafa2a39fadabeb7081 SHA-1: 93ba3477c738087bed6fb4bce73275f08b090be7 SHA-256: dcc88999cb3f078ea60b07a59e787972eb4cbd41178b9260b8129c096e9789f1
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to economics PDFs and the malicious URL itself, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely for SEO manipulation or to distribute malicious content. No scripts were extracted from this sample.

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=definition+of+economics+by+ten+different+authors+pdf
    • http://files.williamserad.com/uploads/1/3/1/6/131637876/cefcf07.pdf
    • http://files.westdesmoineslawncare.com/uploads/1/3/1/6/131637419/gulojixunetim.pdf
    • http://files.rja-designsbyslaglellc.com/uploads/1/3/1/6/131637257/7051403.pdf
    • http://files.westdesmoineslawncare.com/uploads/1/3/1/6/13
    • https://cdn.shopify.com/s/files/1/0435/5276/8151/files/fipisafobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42262915950.pdf
    • https://cdn.shopify.com/s/files/1/0439/2511/0952/files/certificate_of_participation_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemulubu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/92072291434.pdf
    • https://cdn.shopify.com/s/files/1/0435/0060/1504/files/48840249547.pdf
    • https://cdn.shopify.com/s/files/1/0440/3098/4357/files/40874402773.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/jotelo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5866669006.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8246/files/3007906318.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_off00007699.bin
15abe69d6193364ad0ff97d4f3dc2a6d0c7cfde440d17386646a7a48302217ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7699 5604 bytes
font_01_sfnt_off00008987.bin
ef86c88e06dd72139ff04c56c2fdc20e8ae383eceed0fe4e9a133c35b19b9d14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8987 10012 bytes

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