Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac56817c3015df7…

MALICIOUS

PDF

47.2 KB Created: 2020-08-22 12:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f60a42593ae235fdb6ae1f5201ec20e SHA-1: e1f0570e90d9432c67a1fd86f0ded24845bd5e73 SHA-256: 0ac56817c3015df70886859c73b2e7c4136279571195e8349796d2dc3544e424
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one prominently pointing to a known malicious redirector. The document body, though heavily obfuscated, includes a URL that appears to be the primary lure. The presence of embedded links and the ML classifier's high confidence suggest a malicious intent to redirect the user to harmful 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/pify?keyword=whatsapp+status+video+kannada+feeling+song
    • http://files.vote4georgechen.com/uploads/1/3/0/7/130776111/botobunimubiwufofek.pdf
    • http://files.for3sisters.com/uploads/1/3/1/3/131383424/577725.pdf
    • http://files.ieleaders.net/uploads/1/3/0/7/130776718/45c35ab516bd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kenawuvotijogajutimev.pdf
    • https://cdn.shopify.com/s/files/1/0438/2995/2674/files/98072780471.pdf
    • https://cdn.shopify.com/s/files/1/0430/7343/7845/files/jowubekitanasox.pdf
    • https://cdn.shopify.com/s/files/1/0440/5523/2677/files/the_discoverers_daniel_j._boorstin.pdf
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/atelier_meruru_endings_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1591/files/ielts_academic_reading_passages.pdf
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/vezujoduxefejufovol.pdf
    • https://cdn.shopify.com/s/files/1/0438/2703/6322/files/annotates_in_dropbox.pdf
    • https://cdn.shopify.com/s/files/1/0435/7714/7547/files/boomerang_expense_reporting_application.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/welat.pdf
    • https://cdn.shopify.com/s/files/1/0428/5467/8687/files/87184446651.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_off00007b38.bin
91ec878b471cd26131ed9883f47f6af5584544dbe74eb566017626aca0a01d56
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B38 5344 bytes
font_01_sfnt_off00008d7c.bin
9a2ca16a0144ae9a9db2dd04479a92f4fe9e269d0bab6360b46e673730383a43
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7C 9976 bytes