Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14ca22084673cb5…

MALICIOUS

PDF

82.4 KB Created: 2020-08-11 23:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e19e4ed7f79237f44efd432eda6c7007 SHA-1: 59842d06b660d58f4499aa6acadb4b17f43fd095 SHA-256: c14ca22084673cb57d0a085782662b67b4d9d22750ee546935076128e7ade5d4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=congenital+heart+disease+in+pregnancy+pdf'. This URL is embedded within the document body, suggesting the primary intent is to trick the user into visiting a malicious site. The PDF also contains a large number of external links, indicating a link farm strategy. The ML classifier strongly flagged this PDF as malicious.

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=congenital+heart+disease+in+pregnancy+pdf
    • http://files.helenakocis.com/uploads/1/3/0/7/130738794/lelatoxube.pdf
    • http://files.sandstudio.net/uploads/1/3/2/6/132695302/5346308.pdf
    • http://files.herbaceouslyurban.com/uploads/1/3/1/3/131379951/kelotaxemu_wugubefabilesuj_zuwifo_bufosusaku.pdf
    • http://files.misternelly.com/uploads/1/3/0/9/130969580/4808356.pdf
    • http://files.primopianostudios.com/uploads/1/3/1/8/131856333/8490408.pdf
    • https://cdn.shopify.com/s/files/1/0440/3304/8741/files/warefo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/dawubekixovuxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3429/5966/files/namixajujiwekaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/ash_wednesday_summary.pdf
    • https://cdn.shopify.com/s/files/1/0433/9531/7927/files/access_consciousness_bars_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/popowasaju.pdf
    • https://cdn.shopify.com/s/files/1/0432/4786/1923/files/taratuzorasezodikibal.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/gujonafebirabulusil.pdf
    • https://cdn.shopify.com/s/files/1/0433/3430/3912/files/vitofup.pdf
    • https://cdn.shopify.com/s/files/1/0433/7536/2198/files/sepiroxevonu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6529/5526/files/holy_bible_in_bengali_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/65958096421.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/fetamamupegenetilonu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/rabukipasagarowumoxagixi.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbb0.bin
5bf357e4306fe612a794263313629ad6f21b03558aad3319590e6d18a1af495f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB0 5424 bytes
font_01_sfnt_off00010e20.bin
f1684184644bd877775c6d0d901ca69153884ad9f2ac4b5c5e0d303d1a9ca888		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E20 14688 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.