Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53a66721f88edeb…

MALICIOUS

PDF

57.0 KB Created: 2020-10-17 17:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b688c2c6d19e0f961fd24428a56df330 SHA-1: 56a26f09facd4f625c504619430e724f69e72a56 SHA-256: d53a66721f88edeba9e5747b5e40f5602337e6de6ac1769d14aa37020661cdd2
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/strik?keyword=pacer+sealed+indictments In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f871e1ca89c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_5f8822a128f72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370285/normal_5f88525636103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f8733eb3ef60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_5f8a8c0ed9d85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_5f87efabbed02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5f885b589e4ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f8a4b405a15e.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/5b9fb40.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/c25f730.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/nazesari.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/b919b1ed8f.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/2c4124ab5dcd01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3005/9927/files/captain_america_free_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4387/1128/files/69797531150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7309/2766/files/what_is_the_leading_coefficient_of_a_quadratic_equation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2191/7086/files/jugomipas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6651/9463/files/vuteze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1220/2389/files/free_walmart_receipt_maker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8889/4880/files/zusukig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3897/3345/files/vinyasa_krama_sequence.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD9 4764 bytes
SHA-256: af33c2a23b2f8aec8c3fd45c97dfebef1b1603466c15b4a3d8fff65945a16ebd
font_01_sfnt_off00009ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD8 15072 bytes
SHA-256: 0dd05214174ad6a5989cfadfbd8b2679caa7320ef0ffb520aa33d82b26c8800a
font_02_sfnt_off0000c8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D9 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333