Malicious PDF — malware analysis report

Static analysis result for SHA-256 086f94f998f7b613…

MALICIOUS

PDF

36.7 KB Created: 2020-09-17 06:39:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53933fb4da870a889b19d6733b4c4f15 SHA-1: 3bb3040943317819365eb9adeeede5505700f8d6 SHA-256: 086f94f998f7b613c2f95f5e0c8eda2b0a466ad987053dd8fdabd5cf65388bcc
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.club'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign Shopify links but one points to a potentially malicious domain. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the redirector link suggest an attempt to lure the user to a malicious site, likely for phishing or to download further payloads.

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.club/wix?keyword=just+build+lol+mobile
    • http://lewoxobow.berkshirephotographydesign.com/uploads/1/3/1/3/131398455/dipuxarivare.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4319/0946/files/65131039347.pdf
    • https://cdn.shopify.com/s/files/1/0465/1194/7926/files/territory_war_2_armor_games.pdf
    • https://cdn.shopify.com/s/files/1/0462/9964/4064/files/69302176634.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/how_to_open_xv_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15125842299.pdf
    • https://a4fb7a5c-bbb5-43a5-aa06-f1f0b9b6fe16.filesusr.com/ugd/d4579c_c413140fb1e24f258e13399c3692cc66.pdf?index=true
    • https://a80f5578-e2fe-4768-8ecf-3f04f5855a78.filesusr.com/ugd/0cd3a8_066b2831ea2248de8518a02721bc763f.pdf?index=true
    • https://265d018f-73a7-4159-9422-8f8c8c0386ce.filesusr.com/ugd/6d59ab_4889e6242224474c92a4290dcdc9cb28.pdf?index=true
    • https://f8877585-55db-4e39-9459-202158c27d50.filesusr.com/ugd/8a4248_bafbb275bc3e4f4f9b1701b1b8ee15bf.pdf?index=true
    • https://d3780f93-20e1-4c1c-ba51-3214d9f72087.filesusr.com/ugd/33ab24_dcc2388f95d34434bf8df1c34b44eae9.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/34160994684.pdf
    • https://cdn.shopify.com/s/files/1/0433/4924/6102/files/fuziresidiw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b7e.bin
8a269ea6a2f8ea1a35160199dcfea44d3ab58bbe1d6671bdab0377a481b261a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B7E 4792 bytes
font_01_sfnt_off00005bae.bin
cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAE 1936 bytes
font_02_sfnt_off000064ec.bin
cfef32d20832ee60d838e5b2c8ad48ba9cb4cb780b0026fe6c6e61a96f374f10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64EC 9688 bytes

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