Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ba7781f4d47584…

MALICIOUS

PDF

40.9 KB Created: 2020-08-30 22:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30bfd0e725c0e3b643cdc6a96d450928 SHA-1: d3cb182c4db2af811497239cf93c94a4e3813d3f SHA-256: 60ba7781f4d4758401759e6ac597c0729f218218080e6098d5c9e50e38028bf7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and heuristics indicate it contains a large number of external links, a common tactic for SEO farms or to distribute malware. One embedded URL, 'https://ttraff.ru/wix?keyword=food+of+the+gods+movie', is identified as known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to 'Food of the gods movie' and the authoring application 'wkhtmltopdf', suggesting a lure document.

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=food+of+the+gods+movie
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5808/6556/files/19676577164.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/mugab.pdf
    • https://cdn.shopify.com/s/files/1/0441/2581/4936/files/microbial_degradation_of_xenobiotics.pdf
    • https://cdn.shopify.com/s/files/1/0431/9716/9824/files/tipos_de_argumentao.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98455436519.pdf
    • https://static.usrfiles.com/ugd/b8c837_acf7e84155ca4fe594712a62d09d1253.pdf
    • https://static.usrfiles.com/ugd/158fb9_15a6479630844147a176701f7894c1c0.pdf
    • https://cdn.shopify.com/s/files/1/0464/7357/6616/files/financial_analyst_interview_questions_in_xl_dynamics.pdf
    • https://cdn.shopify.com/s/files/1/0428/2171/4079/files/tupekanapubozedemufew.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/rarifijof.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_off000061ee.bin
9a9fcaa25380e3e7307b3df868bb3fc3c7c3c61ab5e62b7abb2b934e5c7505bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x61EE 4996 bytes
font_01_sfnt_off000072e9.bin
d79e181c066fe602c4c76599248ade0ce99b044330c0fc73d3954aa8080d587f
pdf-font-stream PDF embedded font (sfnt) at offset 0x72E9 10656 bytes