Malicious PDF — malware analysis report

Static analysis result for SHA-256 e126052dc49a251e…

MALICIOUS

PDF

41.3 KB Created: 2020-08-30 14:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fa8a409c4a05f290fe624f80d26a3d4 SHA-1: 0af8160a4e462bb6d399f72e96b33e342f7dfaeb SHA-256: e126052dc49a251eaa28851bff46d0c3c588505527eb43b5018da3335fb65f13
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a PDF link farm. One of the primary links points to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the PDF is designed to redirect users to malicious infrastructure, potentially for further exploitation or phishing.

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.ru/wix?keyword=oboe+finger+chart+low+notes
    • https://cdn.shopify.com/s/files/1/0432/3812/9823/files/95582586498.pdf
    • https://cdn.shopify.com/s/files/1/0434/5646/3014/files/49314098154.pdf
    • https://cdn.shopify.com/s/files/1/0436/6876/6873/files/powimef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42632515291.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4976/files/irregular_adverbs_of_manner.pdf
    • https://static.usrfiles.com/ugd/0dd040_5d2496f6899f48c59b5ca2ed2f8227b5.pdf
    • https://static.usrfiles.com/ugd/0d2908_44432f7c04384f0e96ecb5f2916896f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_d960f1f71f894325888f121507b199c6.pdf
    • https://cdn.shopify.com/s/files/1/0437/1342/9655/files/four_brothers_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/9515/4070/files/nomofuvakuva.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/faxosotoxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6584/files/blue_ridge_mountains_fleet_foxes_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/6284/4837/files/gokoxoturaxef.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/falutozodifujexuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5060/files/annexure_e1_hssc.pdf
    • https://cdn.shopify.com/s/files/1/0433/1791/9909/files/lurejimidomorifef.pdf
    • https://cdn.shopify.com/s/files/1/0440/7237/0326/files/dudedobezogoj.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_off000063d4.bin
bfe22fc89f9d63bb8ce56c6de6ebacc41ca0621b259dc5b0fde85ca296408d30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D4 5404 bytes
font_01_sfnt_off0000763a.bin
4601ff390f6b0b731f0c95ff8cefb4447e1c50cd979b13127774b2f1969dee2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x763A 9952 bytes

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