Malicious PDF — malware analysis report

Static analysis result for SHA-256 8926a51e51dab58f…

MALICIOUS

PDF

47.9 KB Created: 2020-08-08 21:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4997f6a34819975cc38c811285dfac6a SHA-1: 22dd96391a096cd5823c28f929f96fb59717405b SHA-256: 8926a51e51dab58fa8b38ab1ae059ca73a4b527fa8d7f01d5c7cd5cf4ca22427
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link disguised as census results that redirects to a malicious URL. The ML classifier strongly indicated maliciousness, and multiple heuristics identified the PDF as a redirector and part of a link farm. The embedded link 'https://ttraff.cc/wb?keyword=kenya%20population%20census%202019%20results%20by%20county%20pdf' is the primary indicator of malicious intent.

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/wb?keyword=kenya%20population%20census%202019%20results%20by%20county%20pdf In PDF document text
    • http://files.mprints.shop/uploads/1/3/2/6/132695730/ca93609700.pdfIn PDF document text
    • http://files.broomandblackberries.com/uploads/1/3/2/6/132682070/tefojonosove_wufiwudusabex_ronufepaves.pdfIn PDF document text
    • http://taweronu.robertoborgatta.org/uploads/1/3/1/1/131163599/lidojekova-bitibes-fifubuwarefuwe.pdfIn PDF document text
    • http://files.naturalcoach.com/uploads/1/3/1/3/131379439/bojota-zipirejowirol-pelenat-pejojetedur.pdfIn PDF document text
    • http://files.connieandcoopercatering.com/uploads/1/3/2/6/132682989/fanuwafedilobo.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/1/0432/5156/4707/files/adobe_lightroom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2868/4701/files/xavojusafuwulawonamakana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/11618810856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3167/3502/files/bundeslnder_wappen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31688109027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/newazetukis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/awash_international_bank_annual_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1922/9591/files/java_remove_element_from_array.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/anthropology_optional_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/goneloxajalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3429/6988/files/migem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/buvaxaxok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4736/0414/files/microbiology_sterilization_techniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/15385395959.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF2 5844 bytes
SHA-256: 2febb1218158979bce028d3f61655c2bbc05e5b79c50ff4c3f38f21db54993fc
font_01_sfnt_off000081ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81EE 14692 bytes
SHA-256: ad3d97cfd84c3850650f8c6e08d08b35ccf923c0dfc1b4b091c033a82f67edec