Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ee3665c47a9876…

MALICIOUS

PDF

123.7 KB Created: 2020-08-03 14:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9da1649545e83bad0283f924e293ea6d SHA-1: cf87aa8debda768b4461b638be8ed269de27ef7d SHA-256: 65ee3665c47a98765be3b493551d40761e5d4d6506498fe79083dd2b9ec2a1ed
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'antioxidant oxidative stress' and includes the malicious URL. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.com/pify?keyword=antioxidant+oxidative+stress+pdf
    • http://kamigak.greensbororoadchurchofchrist.com/uploads/1/3/1/4/131453645/sujasitisimatane.pdf
    • http://files.sass-and-crafts.com/uploads/1/3/0/7/130775384/xabowutegajojifik.pdf
    • http://files.marinacoveconsulting.com/uploads/1/3/2/6/132680932/fewufojapofa.pdf
    • http://files.sandislandtennis.com/uploads/1/3/1/4/131406507/535538.pdf
    • http://files.tag2018.org/uploads/1/3/2/6/132681409/8070250.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/51392608884.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3011/files/the_witcher_3_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/paditugelalaven.pdf
    • https://cdn.shopify.com/s/files/1/0432/7912/2587/files/ministry_of_sound_radios.pdf
    • https://cdn.shopify.com/s/files/1/0430/4430/7098/files/737776473.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/kaxediwadine.pdf
    • https://cdn.shopify.com/s/files/1/0439/1455/9656/files/54736417539.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/jafavamakoravugeginutis.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/rajotipexiforarigasid.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4869/files/wovod.pdf
    • https://cdn.shopify.com/s/files/1/0434/5148/2278/files/jilevageganusugotufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/gubotixidoliwijaxar.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000196bf.bin
03e53afeea4f26969f0a418bf93be38a3961389e5b6af657a46f3f62277a3730		 pdf-font-stream PDF embedded font (sfnt) at offset 0x196BF 5120 bytes
font_01_sfnt_off0001a844.bin
c4250db9f9a856cd2de2ef0da0d44485de82473982ae7e7f337c4a95348737a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A844 10424 bytes
font_02_sfnt_off0001cc0c.bin
99550976dfc1031cc88c38f1ea926cf85cee9dde3bc6029adec2b4c0e217538f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC0C 16128 bytes

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