Malicious PDF — malware analysis report

Static analysis result for SHA-256 cff7d28e3ec246e9…

MALICIOUS

PDF

38.2 KB Created: 2020-10-08 19:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f2319cec3bde4b6db109cafb802ead5c SHA-1: 7e8968256b05ee82a3b286ee3157aafc13a99aed SHA-256: cff7d28e3ec246e9466e800e6129923bf27349211b4fb59b9326e92e425b35fc
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://gettraff.ru/strik?keyword=kickass+photoshop+cs5 In PDF document text
    • http://radal.susanmachamerjewelrydesign.com/uploads/1/3/1/1/131164250/7215939.pdfIn PDF document text
    • http://files.cartonatidesign.com/uploads/1/3/1/0/131070894/4e2bb.pdfIn PDF document text
    • http://wunevaw.airwreckkazillion.com/uploads/1/3/0/8/130814017/kufovuzubiluj-jumupop.pdfIn PDF document text
    • http://files.dealswithdessy.com/uploads/1/3/1/4/131483214/6ca95d8af945a18.pdfIn PDF document text
    • http://files.noyzelab.com/uploads/1/3/1/4/131453919/rexufojiserovepu.pdfIn PDF document text
    • http://files.trustmarkroofing.com/uploads/1/3/2/7/132710683/02c86b6c9.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/1/0482/0808/5144/files/the_bonobo_and_the_atheist_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7899/9960/files/83816994046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4405/6471/files/wovebobes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8125/3535/files/orpheus_persona_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5871/6054/files/spore_galactic_adventures_mods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3755/6889/files/jesafopuretuxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7013/6230/files/saguraxakexakoko.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_off00005933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5933 5048 bytes
SHA-256: 5db9b537ce8edfce2031226a4a858ebfe2d13a1063c19caec672c17aef37dab7
font_01_sfnt_off00006a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A64 9928 bytes
SHA-256: 97c9b1ebdb2f6f556dbd68e4551d7ae53805f4a904ed8baf89176fee17352377