Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e662fbe7c2df1e…

MALICIOUS

PDF

46.4 KB Created: 2020-08-04 01:38:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0b560ef75a5a35f3292be084ce831ee SHA-1: 76eeb675e9e64286b04634e47dc5e9ec170082e3 SHA-256: 62e662fbe7c2df1eeb60f09def97d0d3f5baef7bb59d49a12caa3567d6481c2a
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a primary redirector URL, suggesting a link farm or SEO poisoning attack. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs points towards a phishing or redirection scheme. The document body, though heavily obfuscated, contains the primary malicious URL, indicating an attempt to lure users to malicious infrastructure.

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/pify?keyword=apprendre+le+suisse+allemand+pdf
    • http://files.thedishwashingdoc.com/uploads/1/3/2/7/132712451/memopejedovi.pdf
    • http://files.dancingforjoy1.com/uploads/1/3/2/3/132302819/40b1aa6.pdf
    • http://files.nirvanapilkington.com/uploads/1/3/1/0/131070420/74bf4.pdf
    • http://files.dancedriven.net/uploads/1/3/0/9/130969183/pupozapememiva-seneda-nadomadakires-tenubexev.pdf
    • http://files.sib4sib.org/uploads/1/3/2/7/132741385/dda02c0e0cf1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/526952073.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7717/files/20154110414.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/vowigoliledexugikodajupo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/33656259764.pdf
    • https://cdn.shopify.com/s/files/1/0433/2073/7950/files/3941601492.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/kawikegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/47511912245.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42479515564.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/98909245119.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/27677354409.pdf
    • https://cdn.shopify.com/s/files/1/0431/7632/9373/files/xegarokatalasobawinazuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/0937/5383/files/5933009116.pdf
    • https://cdn.shopify.com/s/files/1/0434/1042/3960/files/riruf.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_off00006a3f.bin
fc9ca2128046adfc4a2f0cffe5dbba2b5632420498b94f803c6b2fb64cbda80c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3F 5176 bytes
font_01_sfnt_off00007bc5.bin
4e63f23c517758580bfb387d97c11e89ffab87f85790e57b238ff504bdde7652		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC5 15780 bytes

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