Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c74b608eeb0df9…

MALICIOUS

PDF

48.6 KB Created: 2020-08-16 20:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 45026e84bb1de5e78288c21e0b914744 SHA-1: 386dca593da56839f32ae84207c9e4055e829c81 SHA-256: 15c74b608eeb0df9f5aeb4a7e5f0aad57ae0ca2ed033746f11a5d5aa1886d7af
162 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.cc/pify?keyword=bangladeshi+natok++2019 In PDF document text
    • http://files.albertyou.com/uploads/1/3/2/7/132740413/9956525.pdfIn PDF document text
    • http://files.mrschristinab.com/uploads/1/3/1/3/131398184/venumukosej-sadomamu-pariduzuxato-kosuretelude.pdfIn PDF document text
    • http://xovan.ckota.com/uploads/1/3/1/8/131856391/8cd17e34.pdfIn PDF document text
    • http://files.uwwatersheddynamics.com/uploads/1/3/0/9/130969322/1d1b1c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6635/0998/files/riburupemuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6133/8531/files/sogelusazofilomed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7568/2972/files/alexandria_of_africa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/93516934053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/41958481253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9307/1774/files/lanikovekaxibifuravo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7221/5448/files/13994483258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0939/1261/files/51751667749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/44146945984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5173/7498/files/42485743243.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A74 5584 bytes
SHA-256: 6040f5f89e872c319bd92108b413733cd1d883c32175c83c142a51a98272a00c
font_01_sfnt_off00006d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6D 8452 bytes
SHA-256: 38d398a8c2a429b8be719af3dc0e56546094d26e2871bfb5738b4ed76c6c3de0
font_02_sfnt_off000088b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B4 1852 bytes
SHA-256: 07ecde503da4517b8f20e35e4c6cab051d84b79abe310f3c2ada97187e7d04e7
font_03_sfnt_off000091a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A6 10360 bytes
SHA-256: e440ce399faaa91f9bf39b823c6ed5f5aafdcc71f241440d016e409fd0c3e95e

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