Malicious PDF — malware analysis report

Static analysis result for SHA-256 d75751ed15b1ffaa…

MALICIOUS

PDF

43.5 KB Created: 2020-08-09 03:27:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 918edd49cd8478fec49e8983a79268ad SHA-1: bfe2bece261879c62cf1ac2d30e31751b0310ffc SHA-256: d75751ed15b1ffaa378177ade0cdde1223af470869d4bd78c0e66801d9670ccb
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Bottom ash handling system pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a link farm heuristic further indicates a malicious intent to distribute links.

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=bottom+ash+handling+system+pdf
    • http://files.chrisbaxtersculptor.co.uk/uploads/1/3/1/4/131437423/liluxoxatazug-misototepukixo-gegekav.pdf
    • http://wusinawa.globalcenterforsuccess.com/uploads/1/3/2/6/132682883/2cfbbbd0.pdf
    • http://files.sasswithclass.net/uploads/1/3/1/8/131856725/bisojevaw_wukazedazili_sarizeselojudot.pdf
    • http://files.adastraspeech.com/uploads/1/3/1/4/131452804/2601426.pdf
    • http://files.lensflared.com/uploads/1/3/1/4/131438177/givulitujizubuz.pdf
    • https://cdn.shopify.com/s/files/1/0438/1189/7504/files/68782802130.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/lava_uke_chords.pdf
    • https://cdn.shopify.com/s/files/1/0432/3514/7933/files/nms_medicine_casebook_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3702/files/waxedamijag.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/60973190313.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4466/files/desastre_de_chernobyl_resumen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26965864763.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/payroll_accounting_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35535883354.pdf
    • https://cdn.shopify.com/s/files/1/0428/3927/7734/files/history_of_neoliberalism.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5686/files/jomopub.pdf
    • https://cdn.shopify.com/s/files/1/0434/5698/7303/files/sapirukidewip.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/68900005620.pdf
    • https://cdn.shopify.com/s/files/1/0440/0496/6565/files/is_iskysoft_safe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9676/0730/files/daxosupevus.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_off00006c69.bin
4d6d9d3885f166c3b879c4f04ed8eb49d21457953a60fed69da2b78ac32c1649
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C69 5512 bytes
font_01_sfnt_off00007f11.bin
6e0abd1ec514f291b661c5f6cf20281ecdfa47c5fc795c9735d3d4682e2d8679
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F11 9908 bytes