Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f2bd478b14c2cb…

MALICIOUS

PDF

50.9 KB Created: 2020-10-20 02:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: bc33e6bc95153fee829bf75dfd57316d SHA-1: c5a0421ddc10493582156522c918dcd931a85f06 SHA-256: 74f2bd478b14c2cb4ffcaa1e6736b4f2883a5f068db6f10739eb6af41106df5e
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.link/123?keyword=chiffres+significatifs+exercices+corrig%25C3%25A9s+pdf In PDF document text
    • https://vekejuritikoj.weebly.com/uploads/1/3/1/8/131857631/5725e.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/9622818.pdfIn PDF document text
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/xebozaxugudezat.pdfIn PDF document text
    • https://soremezu.weebly.com/uploads/1/3/1/0/131070226/vamuzapulufow.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/dcc6feb08a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_5f8d355b1d9bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368478/normal_5f8988b429da0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383314/normal_5f8e0552641c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5f8e10dd18e15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369315/normal_5f88b18b56608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5f891bb336529.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387050/normal_5f8ccbc0b1e15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_5f88a11977dba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_5f886a6a5c778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f893577d4897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f8701de14338.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f87110827439.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/1/0486/1349/0846/files/lofeloji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8357/2411/files/forefonub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3569/7063/files/bazakiv.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_off00006c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7F 3036 bytes
SHA-256: 3f20ccde4a9a6736254d07ee8d0770b2a1e46fa08e74ffcd109e62a68baa3924
font_01_sfnt_off0000775f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x775F 5500 bytes
SHA-256: 3659e596b3e8bb7f684ee7340543c8be553d56eeb4b8bb647c0c72669fce8cb1
font_02_sfnt_off000089c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C5 16676 bytes
SHA-256: 5f503ac1ab1a224718c32f721d45988f2d27b671897a204f4578df4f216f3c19