Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e87f4a4c2e5e46…

MALICIOUS

PDF

54.8 KB Created: 2020-08-23 20:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4faf2c3456a41750fd21c069d838131 SHA-1: c97961ed0344fb0890b702edf7f4080a78ff48d7 SHA-256: 12e87f4a4c2e5e464758643d4a7b52cf48c20be34aaa75190e51c50e93354bef
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body itself is heavily obfuscated but contains a reference to the malicious URL, suggesting an attempt to lure users to external sites. The presence of numerous links, including those to a redirector, indicates a link farm or phishing attempt.

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/pify?keyword=python+generate+barcode+pdf
    • http://files.juliamorizawa.com/uploads/1/3/0/8/130814680/butawiguluvis_gotejabakowod_dovixil_vapabika.pdf
    • http://files.wibimassage.nl/uploads/1/3/2/6/132682913/8369571.pdf
    • http://migezu.pwcyoga.com/uploads/1/3/0/8/130813834/0584f65.pdf
    • http://gasowelin.spusdvisualarts.com/uploads/1/3/1/8/131871991/0aa9e29cb1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6359/7466/files/ascomycetes_reproduction.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/247spidersolitaire_2_suit.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5591/files/1994_ford_mustang_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/0949/9558/files/30859871697.pdf
    • https://cdn.shopify.com/s/files/1/0437/9826/6016/files/34103345983.pdf
    • https://cdn.shopify.com/s/files/1/0439/5224/2856/files/business_plan_for_software_development_company.pdf
    • https://cdn.shopify.com/s/files/1/0433/1801/8203/files/5381549402.pdf
    • https://cdn.shopify.com/s/files/1/0440/2741/2645/files/absceso_periapical_y_periodontal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdf
    • https://cdn.shopify.com/s/files/1/0428/0346/2303/files/masigimuvaluxogutuzi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8930/files/govome.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008160.bin
f93ca1f072f1251aa4acb2520340c094368f53202f0479f3d84ca79120561f70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8160 5452 bytes
font_01_sfnt_off000093df.bin
94e3c933ef6c914dcc610845f9add6ec3c5e3299cc8fa3f33ec3c13daa43a8f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93DF 10836 bytes
font_02_sfnt_off0000b933.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB933 16092 bytes

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