Malicious PDF — malware analysis report

Static analysis result for SHA-256 125a8004b7108546…

MALICIOUS

PDF

41.6 KB Created: 2020-08-01 18:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a49ddfee637c1191f31147874c7f75ee SHA-1: 0f56c5c7e57f780d827e4db4afb97573985747c8 SHA-256: 125a8004b710854634ff59f1d0b0a503283859f65aa4b4db13d84e667e7e90b2
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector disguised as a way to download ROMs from Emuparadise. It also features a large number of embedded links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. The presence of a 'download button' lure and a password archive lure further supports a malicious intent to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=how+to+download+roms+from+emuparadise
    • http://files.robjackson.co/uploads/1/3/2/6/132681559/dulurexadonef-wegof-nogus-vitodafesemekak.pdf
    • http://files.y4f.co.uk/uploads/1/3/1/4/131437123/lenip_vijunobarezate_kuwamuzexigisup_nenujutupovix.pdf
    • http://files.chassepermanentmakeup.com/uploads/1/3/2/7/132712326/sidomijonur.pdf
    • http://files.angiezinserphotography.com/uploads/1/3/1/6/131607866/duledelewununiper.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4603/4846/files/vutuginolokanikapuwogixoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/0631/9001/files/45424589168.pdf
    • https://cdn.shopify.com/s/files/1/0434/8208/7576/files/suviduwokodeta.pdf
    • https://cdn.shopify.com/s/files/1/0432/6952/1568/files/joluwuzeluwo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9635/7530/files/86308936142.pdf
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/zoxunapejesam.pdf
    • https://cdn.shopify.com/s/files/1/0429/7850/8953/files/kukew.pdf
    • https://cdn.shopify.com/s/files/1/0432/7312/6052/files/2194707083.pdf
    • https://cdn.shopify.com/s/files/1/0429/2739/0887/files/9064965432.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/fidetaxexovi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/zulowusiwoto.pdf
    • https://cdn.shopify.com/s/files/1/0439/9860/9566/files/81122337690.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/77225890789.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006277.bin
faaaebed991a09769022a18266f9febb770f16cd363f132695145044f7a66ef4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6277 5240 bytes
font_01_sfnt_off00007446.bin
c05eaf1f64f50485603763070aa935e0c451d2e54617ed4aab2849bda23a7673		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7446 10876 bytes

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