Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc64d8efde499811…

MALICIOUS

PDF

43.2 KB Created: 2020-10-07 22:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bb3e83f20850f38a5b4c736ee6ce83ec SHA-1: a9f2eb66ea3a4bdae6c64ba568b3c7e5d8ae754c SHA-256: cc64d8efde4998117f96bbc44211e21f224faf79573d83d777c9a76f413e16ee
134 Risk Score

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.
  • 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.club/pify?keyword=unit+7+polygons+and+quadrilaterals+answer+key In PDF document text
    • https://site-1040224.mozfiles.com/files/1040224/tomubidewupusododovojoguk.pdfIn PDF document text
    • https://site-1036636.mozfiles.com/files/1036636/22977493437.pdfIn PDF document text
    • https://site-1042539.mozfiles.com/files/1042539/27395225616.pdfIn PDF document text
    • http://mefumigu.medicinemakermama.com/uploads/1/3/1/8/131856408/593bce1a7fee4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3c007ae-60ca-441f-8ece-4197b49daf6b/4197885547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f1ba328-59ab-4c1e-8d67-c9ccc0e077c2/ninuxujusugivowewofejal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5585c137-d19c-47fd-ac5c-142843e5b6fb/leliriwadasolem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e173d4f-c4a3-44e6-b906-bc5930323b4a/16771317887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de2b097c-4ce6-4da1-98a7-83cc920060d2/55845413597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c7a15b5-0e47-43d2-a619-df4c2de17309/zujovikebo.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_off000069fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69FA 5584 bytes
SHA-256: 959343b0a1c0a0865b1fab903987947d04cad322f884ae4b853fa87868636c15
font_01_sfnt_off00007d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D22 10156 bytes
SHA-256: 08d2004823b5b36943cfb8d4e988bcd6a5e461468e7df82207b34f0626199e2a