Malicious PDF — malware analysis report

Static analysis result for SHA-256 052bb998bcf73344…

MALICIOUS

PDF

44.4 KB Created: 2020-08-21 01:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 148d40ac58b9c2b87f45f81823f96c94 SHA-1: f9090aae4137820c618f666a16ed644f9abd713c SHA-256: 052bb998bcf733449fa007a65c8932c52f2e473b6eb8c2d30f899091967ea6eb
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, suggesting an attempt to lead the user to a malicious site. The document body text, though garbled, contains references to 'Sql server 2014 standard edition' and URLs, reinforcing the lure of a software download. The presence of many external PDF links indicates a link farm used for SEO poisoning or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=sql+server+2014+standard+edition
    • http://files.harringtonlanefarmsvillageshop.com/uploads/1/3/1/0/131070733/xobusunep_redanupawebuna_wewamopivoken_xozasolik.pdf
    • http://files.ceasefirenewsite.com/uploads/1/3/0/7/130775867/634214.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0753/1432/files/86175578428.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/robbery_bob_mod_apk_android-_1._com.pdf
    • https://cdn.shopify.com/s/files/1/0435/4582/1333/files/97674810266.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0820/files/45878141561.pdf
    • https://cdn.shopify.com/s/files/1/0429/8519/3621/files/12750456561.pdf
    • https://cdn.shopify.com/s/files/1/0439/3140/2395/files/antenna_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7157/8024/files/77878396986.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/tafulirif.pdf
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/energias_renovables_en_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/tigudejimotutafojidibigan.pdf
    • https://cdn.shopify.com/s/files/1/0431/9536/7585/files/83938403364.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_off00006c4b.bin
8d63cb6a9db96bd47b2fbf5e5c2c113444c60a3012cb58f67f5ae256412cdc97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4B 5520 bytes
font_01_sfnt_off00007f2d.bin
6482eb94be67705b2ef060d4626d0e31d772e4ca02197836d3f13e40558ac402		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2D 11504 bytes

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