Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5abee367e583c5…

MALICIOUS

PDF

43.9 KB Created: 2020-08-13 03:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d36f010ae864978a9c6c7ee880a503f SHA-1: a7cd664a58a0665da63891f28a930bab76c247a5 SHA-256: 0a5abee367e583c5b516d7fb3ff2c6f8ba016f57c6ba953b3e7a2b813c7dd6dd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'weekly menu planner template'. The presence of many external PDF links suggests an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/pify?keyword=weekly+menu+planner+template+pdf
    • http://files.agonyopera.com/uploads/1/3/1/3/131380163/1223523.pdf
    • http://files.vk3sn.net/uploads/1/3/1/8/131871894/d40f274a4b81b4.pdf
    • http://files.midwifeaddison.com/uploads/1/3/1/3/131379477/sonemagek_mazera_xebav.pdf
    • http://nizupux.scoilnaomhfeichin.ie/uploads/1/3/0/8/130813747/ruwuwafesojepisuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8010/5630/files/bank_branch_manager_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0439/2783/0696/files/mogikudagafazo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5025/3979/files/php_xml_to_array.pdf
    • https://cdn.shopify.com/s/files/1/0433/9826/7029/files/human-_eating_lady_persona_5.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/82726791856.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/vaxilobizube.pdf
    • https://cdn.shopify.com/s/files/1/0435/2075/3823/files/north_ayrshire_school_holidays_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0447/7085/3013/files/contradicting_bible_verses.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/65910375927.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.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_off00006ebc.bin
542dc7c46c5808e9fda335cbc68c8a753415660daa44739a4aaf3a0ba0b9c1f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBC 5188 bytes
font_01_sfnt_off00008062.bin
370a63458a651ebaa8ec61f9e42812ef67208b48545b42bb82a30ea2922dd78c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8062 9980 bytes