Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0e695152f3e002…

MALICIOUS

PDF

44.5 KB Created: 2020-08-31 21:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e50b6d6c3cc34e82d79968e128b62de8 SHA-1: c34dadd944c2a09a0f0e47972b37e8f27d91ee38 SHA-256: 0e0e695152f3e00227c3e70ba7e3d45512ac5c3e7574a1bf2aefbfc35a654b8a
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.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are to benign Shopify-hosted PDFs. The ML classifier strongly flagged this PDF as malicious. The embedded URL is likely intended to lure the user to a malicious site, potentially for further exploitation or phishing.

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/wix?keyword=binary+to+octal+conversion+questions+and+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/1251/1128/files/negative_prefixes_adjectives_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/98013290020.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6345/files/discord_js_totoal_messages.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2332/files/lewos.pdf
    • https://cdn.shopify.com/s/files/1/0431/7541/1872/files/3534216217.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2bfe7550c034fc0a0d9026a4d0f3553.pdf
    • https://static.usrfiles.com/ugd/e1d12c_5d323c2e53a845698aa18c7bf7c633b4.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6861/files/concrete_and_abstract_nouns_worksheet_high_school.pdf
    • https://cdn.shopify.com/s/files/1/0461/9567/1203/files/coordinate_grid_worksheets_6th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0465/0860/5590/files/61390601737.pdf
    • https://cdn.shopify.com/s/files/1/0437/3816/9498/files/itr_acknowledgement_form_2020_15.pdf
    • https://static.usrfiles.com/ugd/9d869b_87cd4ad4ca9d4a4988b1ca325cdbf3c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_45da52d625c44efcb53d7e24afddb6c0.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_off00006286.bin
c8b6d69e1e6deb259f53c64816c5a6f4435f256760927f78b764140189cd1047
pdf-font-stream PDF embedded font (sfnt) at offset 0x6286 5364 bytes
font_01_sfnt_off000074ec.bin
138e080b33ae9d05c9c1385db5e8c4388dfe57037961a82e508bd20c446046c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x74EC 15260 bytes