Malicious PDF — malware analysis report

Static analysis result for SHA-256 609526d642fda7da…

MALICIOUS

PDF

41.6 KB Created: 2020-08-31 18:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 530717bfcbbd38f8fdb7a8fc776e704c SHA-1: a83cd4d9d520694778d0a4e4adacdb44fd739faf SHA-256: 609526d642fda7da2b3aca1f3d2bf8bbe6aeebace3f94928380ea552503006a3
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure for users interested in 'guided meditation'. The presence of many external links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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=guided+meditation+healing+inner+child
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/384ea4_5c341f8697074093a90cea09a2b27565.pdf
    • https://static.usrfiles.com/ugd/55cc32_0e0df35d286d4710b6e987ca5ccbf0b2.pdf
    • https://static.usrfiles.com/ugd/3f0e57_1155f3700975406f9253b2568c084f0e.pdf
    • https://static.usrfiles.com/ugd/0789d5_3d3102f3ca4c471bbc66d69de015df03.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.pdf
    • https://cdn.shopify.com/s/files/1/0436/8115/3177/files/balanceamento_por_tentativa_exercicios.pdf
    • https://cdn.shopify.com/s/files/1/0439/1088/9624/files/zambian_mathematics_syllabus_d_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6394/files/game_broken_age_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3144/files/lijobepibawak.pdf
    • https://cdn.shopify.com/s/files/1/0436/8121/8710/files/inorganic_chemistry_notes_for_neet.pdf
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/r_markdown_table_of_contents.pdf
    • https://cdn.shopify.com/s/files/1/0437/9770/8957/files/bootstrap_datepicker_pt-_br.pdf
    • https://cdn.shopify.com/s/files/1/0429/7352/8223/files/adjectival_clauses_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/8758/3650/files/91401734561.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_off000064a5.bin
e4c380130a30eb8a7144145de699be80c65683d9fefe6afe03122986595ea500
pdf-font-stream PDF embedded font (sfnt) at offset 0x64A5 5208 bytes
font_01_sfnt_off0000762c.bin
4bfd4fd7d02bc9f25554b70f3ae3e9dc6ae3b3295a2ebba09af185794ac68863
pdf-font-stream PDF embedded font (sfnt) at offset 0x762C 10300 bytes