Malicious PDF — malware analysis report

Static analysis result for SHA-256 65aa1da065008ea6…

MALICIOUS

PDF

37.4 KB Created: 2020-08-30 02:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2aad7947e0637b545f06a9df637b7a3 SHA-1: 99644e59ad181a8bfad3caff13da241c883f6093 SHA-256: 65aa1da065008ea6c55dc6c8a810304d9e3078e98a0605321d0b1e801849a533
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 'https://ttraff.ru/wix?keyword=dj+khaled+grateful.+zip'. This URL is likely used to redirect the user to a malicious site or download further malware. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign but serve to obscure the malicious one. The ML classifier strongly flagged this PDF as malicious.

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.ru/wix?keyword=dj+khaled+grateful.+zip
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_23d4e0d7390145788bea8d2e38bd1cc9.pdf
    • https://static.usrfiles.com/ugd/868401_de099b17585b40208ea3cadaf3a8420a.pdf
    • https://static.usrfiles.com/ugd/a107db_ed79ab02605c4dd2a4b1c3de69d40822.pdf
    • https://static.usrfiles.com/ugd/4f270c_5d3b712a12b347fbbe08eed9b0c62637.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecbae893454846a49b35a5d79251e6c3.pdf
    • https://static.usrfiles.com/ugd/7c3584_db5694448d8640178286baaf26d1b45f.pdf
    • https://cdn.shopify.com/s/files/1/0434/8339/8310/files/anthony_giddens_modernity.pdf
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/chahat_new_punjabi_song.pdf
    • https://cdn.shopify.com/s/files/1/0435/1302/0570/files/simeka.pdf
    • https://static.usrfiles.com/ugd/b8c837_23a055ba82364faa9aee6e7df11a00e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_b89b70d13faa442ebdba2253dfcfa388.pdf
    • https://static.usrfiles.com/ugd/2b3f46_e84d20a3438a4502882a9e7468ea4ae2.pdf
    • https://static.usrfiles.com/ugd/b8c837_b34f62ec83c045cb9e642d86486e82c6.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_off000051e1.bin
8bad4660a6085477f77c31b40e0dc4ee07c90638bd7337ce7f813c388d936a98
pdf-font-stream PDF embedded font (sfnt) at offset 0x51E1 5348 bytes
font_01_sfnt_off00006420.bin
9ebff3c027b8d9057278102de9af602e0019a128293010da51c4d4ecb4a77b74
pdf-font-stream PDF embedded font (sfnt) at offset 0x6420 10904 bytes