Malicious PDF — malware analysis report

Static analysis result for SHA-256 000cf6aa74f123ab…

MALICIOUS

PDF

38.7 KB Created: 2020-08-17 09:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55c5f1f965d787ca9e8f3570df2a3884 SHA-1: a017e15d12bc582ce7889e310bba813d085ca4f5 SHA-256: 000cf6aa74f123abcddb04599d616a8b768d2ea5cf8e1a65730047d570f131ba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The primary malicious URL, 'https://ttraff.ru/pify?keyword=kamyab+jawan+form+online+application', is likely used to direct users to a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to application forms, suggesting a lure.

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=kamyab+jawan+form+online+application
    • http://files.bridesburgoc.com/uploads/1/3/1/8/131871614/5888667.pdf
    • http://files.bulverdepregnancy.com/uploads/1/3/1/6/131636841/sasabuvegi-juvojubojad-vupugupiwerum.pdf
    • http://files.oncccrnet.org/uploads/1/3/0/7/130776158/e5b9d368a71.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/5344653396.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/39617609193.pdf
    • https://cdn.shopify.com/s/files/1/0432/3331/2925/files/rafusifajajon.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7039/files/lebojifejunebozelanelere.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6677/files/wopitipakuraduxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0327/3628/files/fijorikaxogiwig.pdf
    • https://cdn.shopify.com/s/files/1/0437/9957/6733/files/xofugajarasotu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4448/6824/files/81034413534.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/fukozu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/bodim.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6343/files/doterra_on_guard_beadlet.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_off0000589c.bin
62cfc153aa8695d02e0e223cfef5232254435d627930d96ef50bc01f43fdba49
pdf-font-stream PDF embedded font (sfnt) at offset 0x589C 5360 bytes
font_01_sfnt_off00006ae4.bin
c403cd8cd6e9cb5d1fca28fee52d6139845135b419acb0cf94962b3e258649e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE4 10240 bytes