Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd4e46d694c3e3f…

MALICIOUS

PDF

41.9 KB Created: 2020-08-22 08:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f41a4873388b02438a432110f1d01072 SHA-1: 30aec4b6a4293d6ce18629a5f8139477b92c4de6 SHA-256: dcd4e46d694c3e3f33f380cbf39cc8ce0e26dfa38a22aec6cdc19351c9323eb5
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://ttraff.cc/pify?keyword=google+sheets+calendar+cell In PDF document text
    • http://sanuw.wrinklecreative.com/uploads/1/3/2/8/132814930/sabojobuwufefov-damigadidukes-ximuruwabozaj-darerabawafero.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/1/0433/9925/0081/files/mijuxitaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4962/1406/files/because_he_lives_hymn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3608/0288/files/79775309926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/losenojumumorajowata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1008/8342/files/67723775312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/25482665136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5817/3854/files/nujokeroruki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4228/1371/files/91545277040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0599/3375/files/jozisod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3070/7356/files/vibabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/beginning_programming_with_java_for_dummies_6th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/26565172466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/mugab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2021/6476/files/dofadolagegizinexe.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_off00005a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A47 4972 bytes
SHA-256: b6d82c98409049e04bc54bb41b865ad6f156264bd1d504ea79fd535728d37b79
font_01_sfnt_off00006b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B22 9880 bytes
SHA-256: c5c802dc6ee6966080e4c801f9561ccab1f91fe6212f999db709007f52f2e55b
font_02_sfnt_off00008cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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