Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c589c805b85475…

MALICIOUS

PDF

42.2 KB Created: 2020-08-19 23:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3c72e480695f607a118cdddad8fa1d2 SHA-1: fe567c130a271dc338ef29f3c38719a286378cdb SHA-256: 95c589c805b85475d14d6475721f491939bed5b9141c8c78d13fa82dd0ea5a85
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=clue+score+sheet+online'. This URL is presented within the document body, disguised as a 'clue score sheet online'. The PDF also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=clue+score+sheet+online
    • http://files.camarillochamber.org/uploads/1/3/2/7/132740586/4181754.pdf
    • http://feferiw.mikkimono.net/uploads/1/3/1/0/131070420/pesonitovodejet_mipiwovinuzif.pdf
    • http://files.georgiasociology.com/uploads/1/3/1/8/131871433/8b3c4feb60.pdf
    • http://files.ronaldscottprice.com/uploads/1/3/1/3/131383604/8d2c609.pdf
    • http://noxejo.revdanielgregoire.com/uploads/1/3/2/3/132302780/ce5119c2a5.pdf
    • https://cdn.shopify.com/s/files/1/0438/2703/6322/files/tiwujura.pdf
    • https://cdn.shopify.com/s/files/1/0434/2710/2887/files/false_ceiling_catalogue_for_bedroom.pdf
    • https://cdn.shopify.com/s/files/1/0451/2101/1865/files/vehicle_wrap_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0452/8803/0370/files/sentencia_caranchoa.pdf
    • https://cdn.shopify.com/s/files/1/0439/3464/6440/files/gubiluw.pdf
    • https://cdn.shopify.com/s/files/1/0437/3302/4929/files/solution_manual_for_statics_p_beer.pdf
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/algebra_2_textbook_online.pdf
    • https://cdn.shopify.com/s/files/1/0435/5964/9429/files/tanugivoxalulepelimu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5891/files/bsac_try_dive_medical_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/0273/2448/files/reduce_size_macbook_air.pdf
    • https://cdn.shopify.com/s/files/1/0434/6734/1974/files/saletago.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77439678162.pdf
    • https://cdn.shopify.com/s/files/1/0432/4920/5405/files/texto_informativo_sobre_meio_ambiente_5_ano.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_off000065fd.bin
61fcd3adf3e087b053acb48257589e42b1da8780169b16a79fc8aa245e07c524
pdf-font-stream PDF embedded font (sfnt) at offset 0x65FD 4584 bytes
font_01_sfnt_off00007587.bin
49cc6e440ba5fdbe756b63ff5cba58fc5d763369ae07be6c9a677e3728cb758e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7587 11196 bytes