Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d9630368a4d187d…

MALICIOUS

PDF

41.4 KB Created: 2020-08-30 18:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4433c667b287b1a5742c9fc664d6e489 SHA-1: b1bff34377c1c0747db4a300f4bf061d001e00ef SHA-256: 6d9630368a4d187daac22eb2490dbf19a90633a1828f822b9eaae61ba42e5ca7
154 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.me'. It also exhibits characteristics of a PDF link farm, embedding numerous external PDF links, twelve of which are identified. The ML classifier strongly flagged this PDF as malicious. The embedded URL 'https://ttraff.me/wix?keyword=test+de+brunet+l%25C3%25A9zine' is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site.

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.me/wix?keyword=test+de+brunet+l%25C3%25A9zine
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/36f25b_acd35dc9aab24d1daac15c12c501875d.pdf
    • https://static.usrfiles.com/ugd/1a89c8_39c92a674fcf4864875542693c5095cb.pdf
    • https://static.usrfiles.com/ugd/804ff6_08b222d98b0248619c3d3eefdcda3185.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d5d4559799d4e79b77e9104af2e55d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_e285629aa57b4869b8e57c127a89b030.pdf
    • https://static.usrfiles.com/ugd/87a178_453e9c507a204a058e168cd7f8bef4b5.pdf
    • https://static.usrfiles.com/ugd/cdb50c_a19a82a07d6f4397a91ea97dc02246e1.pdf
    • https://static.usrfiles.com/ugd/8d57bd_ca200065bd2a49cb8ba197b02023058f.pdf
    • https://cdn.shopify.com/s/files/1/0431/6158/3776/files/big_ideas_math_red_answers_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0438/5583/9392/files/aol_app_for_windows_7.pdf
    • https://static.usrfiles.com/ugd/de3d83_f3a53717215a4c6eadba7392416acaed.pdf
    • https://static.usrfiles.com/ugd/b8c837_07d133cd68a94983bde22cdd42526000.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_off000061e4.bin
a4331bde7fbd8279a0b41404333e7dfa09a368ea39fba6e17b4f3b0f4dce38dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x61E4 4888 bytes
font_01_sfnt_off0000724a.bin
2514f73c60c648339ca4725563ef918af10e0c1c0139f92a51ffce445b0ae0c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x724A 11460 bytes