Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7d7b49ba4bbe67…

MALICIOUS

PDF

46.4 KB Created: 2020-10-25 12:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: c489fc331b87d067e68ea63538b6afeb SHA-1: f7af76954a94ca54b5a2946995393e67b14dd184 SHA-256: db7d7b49ba4bbe670ccbbda2fd074125c94386462b86748a92aef2e44245031d
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.me/123?keyword=easy+bible+quiz+questions+and+answers+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380674/normal_5f8d7beab14da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384296/normal_5f945b7c65267.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378152/normal_5f8ab746b1516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f8a86525a535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f94c1899fd2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390328/normal_5f90f3a9ee0db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f88be2a78bd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410015/normal_5f9304d028f12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5f92800785ff6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381539/normal_5f8be0dfec241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383445/normal_5f8e66b9951ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007484.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007484.bin)
    • https://uploads.strikinglycdn.com/files/8f3f4a7a-171a-4684-a7ad-a1112c6ef390/tixutetubuwoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d0a4807-c678-4be9-8214-12c2c2b109b7/70735849339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16ac0a4d-5b0e-4727-8641-cf3b3e6af684/12207511983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d57194a-1fb6-4cf1-bfd4-4baf6601568e/20802351102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcfa60ba-b944-44e4-a63a-0b91584ccd47/viluxezesemobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d4ba31f-8be2-40d1-9f64-52fa965860ca/nojujaxumirefudejivipa.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 extracted file (font_00_sfnt_off00007484.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7484 5504 bytes
SHA-256: 39766d683b33a662673289f4d6333e9de65afcef795379cf8f4deb666c2e58a8
font_01_sfnt_off0000875e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x875E 10808 bytes
SHA-256: 9d9432640cf5eb2fa22363af5c581e38a64e5d68ca29928644cf2fa1dc7335c5