Malicious PDF — malware analysis report

Static analysis result for SHA-256 030ab6039b21a737…

MALICIOUS

PDF

53.7 KB Created: 2020-08-30 13:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6345dc5607caf4750ab6fe60a508f49f SHA-1: f77d64e92f4690f064cf6c8b07e9ca8f8fb50f05 SHA-256: 030ab6039b21a737638e31e49f82acbfa23c83dd5709503e61e483e341312a70
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, one of which, 'https://ttraff.cc/wix?keyword=apache+camel+log+header', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many pointing to 'usrfiles.com', indicates a link farm strategy, likely to obscure the malicious redirector or for SEO manipulation. The ML classifier strongly suggests maliciousness.

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=apache+camel+log+header
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_d424ac2844b1474390a801dd8b290f2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_09afb7bc9c834125bc5547bdd4df0aea.pdf
    • https://static.usrfiles.com/ugd/9734e7_8f65c2cd58be4db8854b5f62fdf6cdb8.pdf
    • https://static.usrfiles.com/ugd/b8c837_dce6b614c31746b3a4c9b72b73c21fbc.pdf
    • https://static.usrfiles.com/ugd/b8c837_323fc7260c8e4fbf8ba06a48e7f2aac7.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/gipeledagawozokirezi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/wekanaduwuxiwelo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/68135366879.pdf
    • https://static.usrfiles.com/ugd/12f4eb_f094ecad00aa4ffab8745b210e383282.pdf
    • https://static.usrfiles.com/ugd/99965f_f15bc015f6ca484e9f417a1d5b4d9f77.pdf
    • https://cdn.shopify.com/s/files/1/0432/7328/9888/files/perufiwevukujobepuranesav.pdf
    • https://cdn.shopify.com/s/files/1/0439/2399/6840/files/tv_guide_bbc_news_channel.pdf
    • https://cdn.shopify.com/s/files/1/0437/9194/1781/files/english_to_english_oxford_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7960/6176/files/answers_to_common_behavioural_interview_questions.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_off00009329.bin
c6b52e4b7c5bc23cdcd5a6bcb2dbed1dc3316d0f68cbd371d70d65da72dfa66b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9329 5296 bytes
font_01_sfnt_off0000a4fc.bin
4e6cd4eaec2f8994b2c8054cf7a7278c180cf61f43c8e4e00b41fa7470a94711
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4FC 11172 bytes