Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a8065f21829239…

MALICIOUS

PDF

33.9 KB Created: 2020-08-30 05:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d044936fd28c01d437308dfc4978d1a1 SHA-1: fc996f29d30535802b15198aa6dfe42ad0f13a13 SHA-256: 18a8065f21829239b76ff748ca9e3616bf683f6aa50ec2b4cf2878b7b2f12dad
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, a common tactic for SEO link farms and phishing. One prominent link, 'https://ttraff.com/wix?keyword=olurum+turkiyem+mp3', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and appears to be a lure for users searching for specific content, likely to redirect them to malicious infrastructure.

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=olurum+turkiyem+mp3
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0446/9827/1897/files/12th_biology_notes_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5067/2026/files/nofagubuloxipoxejabipo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2879/0946/files/54271368064.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/zogunosoved.pdf
    • https://static.usrfiles.com/ugd/353d00_6c64f8aedde14ea4a92aeded3bad4ebc.pdf
    • https://static.usrfiles.com/ugd/fd3290_c902e7e9ebcf4cc2a0e95eba77cf934d.pdf
    • https://static.usrfiles.com/ugd/a86d68_5225744c600d44bf8033f4adf95f915b.pdf
    • https://static.usrfiles.com/ugd/9f6a24_9b034ccbf0724b5eb7ebd2a9dcc4eb3b.pdf
    • https://cdn.shopify.com/s/files/1/0435/1305/3343/files/58238236857.pdf
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/24094433876.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/23403860400.pdf
    • https://cdn.shopify.com/s/files/1/0448/9238/9531/files/bangla_book_download_free.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_04a811a02698470ca25ebd510f4cc9b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_06e809e4fc31494ea0b6ed5c3044aae4.pdf
    • https://static.usrfiles.com/ugd/b8c837_20de3a8b3a7c429c996668ffc80d8e8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b4014c6baa24e85b730d37e90d6527e.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_off00004655.bin
b38f2c10b4e5c749e944c9720469cc686a3beb767323639755b7dc5e6d837d45
pdf-font-stream PDF embedded font (sfnt) at offset 0x4655 4932 bytes
font_01_sfnt_off00005717.bin
dfd143a91c99c329ec0c341a13b2ac3c64dab0617a00cb2bb2fdc8e1c651bed9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5717 11292 bytes