Malicious PDF — malware analysis report

Static analysis result for SHA-256 f09aeeffc443c9b9…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 04:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfcff731777da1b5c98d3318311642a6 SHA-1: 1bbe07718722028291bf20530fd98a8fbd369e50 SHA-256: f09aeeffc443c9b99a80b39f8f993d8556148c3a5f674f4292771778e1d860f9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the string 'https://ttraff.cc/wix?keyword=5e+pirate+campaign', which is flagged as a malicious redirector. The presence of a large number of external PDF links suggests an attempt to obscure the true malicious destination or engage in SEO manipulation for malicious purposes.

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.cc/wix?keyword=5e+pirate+campaign
    • https://static.usrfiles.com/ugd/b8c837_8758fbd13a154e019d46c88081db4d8f.pdf
    • https://static.usrfiles.com/ugd/e2b09b_ddaf55d5387d43b3ac1f9f2880283cf5.pdf
    • https://static.usrfiles.com/ugd/b8c837_13a468482e48450dbbfc3fc476ab9681.pdf
    • https://static.usrfiles.com/ugd/b8c837_7056f474405147048f057f18428ca38b.pdf
    • https://static.usrfiles.com/ugd/b8c837_31d8b11be27e4e3fba4150704e3391fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_c17d130facb3441690e2030855741e61.pdf
    • https://static.usrfiles.com/ugd/b8c837_581ea006585b4ab29b69a9eaba43713e.pdf
    • https://static.usrfiles.com/ugd/89363e_1f6bfc66118b4ee0bb9eb8b761b2f5eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c626649102a4549a26980a6f02a05ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a52368b596f478d9d461d82e1e04ed9.pdf
    • https://static.usrfiles.com/ugd/724fb5_00406bf851a540059305a9520a0c541e.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e1b23471f6f4d3e8f2d2802ff2bfa3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_bab60b6c30cf4dcdba911e67216e2fb4.pdf
    • https://static.usrfiles.com/ugd/b8c837_18983a5e8b1d4444844dd1e7efeed1f3.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/3259818275.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/84958183393.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006550.bin
ff2d96587cc53c86dadbb03bdf71e12bd2e056de3151c917e61699186a9fbd5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6550 5072 bytes
font_01_sfnt_off00007679.bin
fb36f4b209f4f394da6df44320570065cf210bcdf2a5619eb840bc7d32593ea6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7679 10896 bytes