Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c8f579ac47b1b89…

MALICIOUS

PDF

34.3 KB Created: 2020-08-07 01:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 713138ef62e5816c130f50f6085324d3 SHA-1: ce7d142aa8c219c462886045134effc7e3cc79a0 SHA-256: 8c8f579ac47b1b89abbc26ba29c2d2dbdf344a9a0fc3dfbe7a3d3af822b86296
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for a genetics textbook test bank, combined with the malicious redirector URL. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to Shopify domains, suggesting an attempt to obscure the malicious destination. The primary malicious IOC is the redirector URL.

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=genetics+from+genes+to+genomes+test+bank+pdf
    • http://files.kingdomtransformationchurch.org/uploads/1/3/1/3/131380688/5405786.pdf
    • http://xetisagek.gateaumarche.com/uploads/1/3/1/8/131857315/nikexivetagedux.pdf
    • http://files.mralban.com/uploads/1/3/1/4/131438532/polaten.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/70152669164.pdf
    • https://cdn.shopify.com/s/files/1/0436/9183/5545/files/ffxiv_act_overlay_plugin.pdf
    • https://cdn.shopify.com/s/files/1/0430/6327/9767/files/jumolusudunoxedifutos.pdf
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/bibonetapufexefuluxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7503/5541/files/17946767358.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/9300299220.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/topology_mathematics_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/1156/3932/files/adware_web_companion.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/38771728404.pdf
    • https://cdn.shopify.com/s/files/1/0429/2493/3283/files/premier_mathematics_grade_7.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1054/files/32620162718.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_off000048a2.bin
e2b7971fcca41b4023a06212e46065f6c28bd2ee74c69e9eccef17beaf0a750e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48A2 5676 bytes
font_01_sfnt_off00005bda.bin
5c15e9a353da24eb955fca38257ac8aabe31b370f8b6b160754e0c2a4d28fc67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDA 9572 bytes

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