Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd9220674007a40…

MALICIOUS

PDF

53.4 KB Created: 2020-09-29 19:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87db3cbd9e66c71387ccea675be341bf SHA-1: d6c2dc0147fcff362ae3c7dc4c0693ee9842a88b SHA-256: bcd9220674007a40a9f11d72572a8748ccb40fd5b66989c2a06ec664c90f4e8f
128 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'Tally voucher entry questions pdf download' and embeds a link that redirects to known malicious infrastructure. The document also contains a mass external PDF link farm, suggesting an attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes. The primary malicious IOC is the redirector URL.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://cctraff.ru/strik?keyword=tally+voucher+entry+questions+pdf+download
    • http://files.utadeltazeta.com/uploads/1/3/1/4/131437859/d319aea3a3a.pdf
    • http://bewofafoz.almostsponsored.com/uploads/1/3/1/4/131482822/01c9317823.pdf
    • http://vevel.qslowsmoked.com/uploads/1/3/1/4/131406535/5563854.pdf
    • http://files.nolapapa.com/uploads/1/3/1/6/131606490/xalubabate.pdf
    • http://files.sdwoundedwarriortennis.org/uploads/1/3/1/4/131453431/bukuvoxasijunedu.pdf
    • http://mawabos.ihmcenterforliteracy.com/uploads/1/3/0/8/130813592/6302605.pdf
    • http://files.adamgormley.com.au/uploads/1/3/1/4/131437984/jerafowodore-xumufunamulez-rukon.pdf
    • https://cdn.shopify.com/s/files/1/0434/0236/3047/files/download_world_conqueror_3_unlimited_medals.pdf
    • https://cdn.shopify.com/s/files/1/0433/4151/2855/files/93912896808.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/action_rpg_online_android.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_off0000861b.bin
5ec18817920ae329bd94b9429450e1ccbb7b88feb1d3b1a894a34cbab7427272		 pdf-font-stream PDF embedded font (sfnt) at offset 0x861B 5572 bytes
font_01_sfnt_off00009920.bin
63ad92d640a977fdb5f1d546839b503772122d63bee42801cd7244c9ba9f26b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9920 14784 bytes

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