Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af4114aee53ff09…

MALICIOUS

PDF

65.1 KB Created: 2020-08-18 15:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2472344022dd7cc4d9e9ae5bb80fba8 SHA-1: 75b27e4677e270a059f34605bb594273acc6357e SHA-256: 0af4114aee53ff09e9418fcccf54b7f58ff855a1bebef8398448512b456d9266
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a bodybuilding amino acid guide. The PDF also hosts a large number of external links, many pointing to Shopify-hosted PDFs, suggesting a link farm or SEO manipulation tactic. While no scripts were directly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to further malicious content.

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=amino+acids+guide+bodybuilding
    • http://files.sebasclofsky.com/uploads/1/3/2/6/132681992/7122083.pdf
    • http://lagupitub.mackenziewooddesign.com/uploads/1/3/1/4/131453494/8adf0637.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0054/4931/files/46907864418.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/voriwojixuferetiki.pdf
    • https://cdn.shopify.com/s/files/1/0434/1530/6405/files/35659198009.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/jupove.pdf
    • https://cdn.shopify.com/s/files/1/0435/3028/9311/files/answers_to_what_am_i_riddle_game.pdf
    • https://cdn.shopify.com/s/files/1/0431/5732/3933/files/95121579245.pdf
    • https://cdn.shopify.com/s/files/1/0439/1229/8648/files/32541066329.pdf
    • https://cdn.shopify.com/s/files/1/0433/9967/6060/files/eros_miami_ts.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/annadata_books_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4282/4611/files/73486996177.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/quizas_quizas_quizas_piano_sheet_music.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_off0000c201.bin
33d650de654cd35e809a5b412cf46110eb35b73424f4d5cf8f6af01e2cdacad6
pdf-font-stream PDF embedded font (sfnt) at offset 0xC201 5392 bytes
font_01_sfnt_off0000d440.bin
295d378415a658112dc1a891f5d14fe8513c2e95094c084a2ca9d3069ed55a0a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD440 10280 bytes