Malicious PDF — malware analysis report

Static analysis result for SHA-256 486dcddfe983addb…

MALICIOUS

PDF

38.6 KB Created: 2020-08-08 11:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a3f9c1e4e343171fe946f1cb5a836da SHA-1: a3464bd247fbf550f23c967015d250dc1494b165 SHA-256: 486dcddfe983addb7323774c40b37d81dc1f66d2235397b4d127594de9745b68
130 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body also contains a search query for 'edit pdf free offline' and a visual download button, suggesting a lure to trick the user into clicking the malicious link. The presence of a mass external PDF link farm further indicates a malicious intent to distribute content or redirect users to malicious sites.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=edit%20pdf%20free%20offline
    • http://kovisilu.sctexgoatclub.org/uploads/1/3/1/3/131379730/pasewetu-tamet-xurira-somulo.pdf
    • http://varisiti.njslaw.com/uploads/1/3/0/8/130814017/wuzegiluzusozujalif.pdf
    • http://files.koshercorner.org/uploads/1/3/2/7/132740352/58fb93c.pdf
    • http://lozuzebel.fwgrace.org/uploads/1/3/1/6/131606094/kibujutu_zusefameror_jikomurudef_lonixasiril.pdf
    • https://cdn.shopify.com/s/files/1/0439/5555/2414/files/firmware_vs_software.pdf
    • https://cdn.shopify.com/s/files/1/0433/7991/6967/files/do_a_barrell_roll.pdf
    • https://cdn.shopify.com/s/files/1/0433/2814/3510/files/wafemaxokerimagokifud.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/sekiro_bundled_jizo_statue.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/zepetipozagigewudakomari.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8947/files/5082881461.pdf
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/wepurulelonigidulegupibib.pdf
    • https://cdn.shopify.com/s/files/1/0433/5848/6678/files/nufetejavomalovezume.pdf
    • https://cdn.shopify.com/s/files/1/0429/0212/6755/files/96022794747.pdf
    • https://cdn.shopify.com/s/files/1/0433/6962/7799/files/tipos_de_sustantivos_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0435/2809/3850/files/velatimawo.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_off00005bea.bin
8212c38b89be01c7560c2fe005a6beba675e5417f59f9b7170309741f49a1798
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEA 4604 bytes
font_01_sfnt_off00006ba7.bin
cf58f7aa4f57a93330fd89baafc42efa5017a8ed0c3c9420388e741aaec11915
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA7 9888 bytes