Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd7a817f0ad6f2e7…

MALICIOUS

PDF

38.8 KB Created: 2020-10-25 06:18:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 7185d2aefd431dfbc40eee9232c01e57 SHA-1: 6ce42b41ade57ee7cba87e0c5ca2c099d7159d02 SHA-256: dd7a817f0ad6f2e7809f71ca9a4ec6c97eaf66d0e0bf0467aeb8c0957fbd80b7
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.club/123?keyword=followers+chief+cracked+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_5f8b2aa35620e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374376/normal_5f9092feb861c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375073/normal_5f8efb59e3b5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5f8c8d384199f.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/1/0465/0768/8086/files/tenugisagesesidovorivutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0413/6093/files/pearl_from_spongebob_mom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/5665/0144/files/corrugated_cardboard_sheets_4x8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8382/2770/files/railway_track_security_system_using_gsm.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/18357645073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9583/4280/files/marie_kondo_en_espaol_netflix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3811/9838/files/menosodamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8720/2971/files/netgear_n300_ex2700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7066/6946/files/duxivun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7669/1136/files/pakovubazosot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8794/0776/files/duzuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/niwomi.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/ragew.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_off0000570a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x570A 5352 bytes
SHA-256: 055ab09f59dca6ba393d979b3a999e09c3ce78ff55142b5a512dfb5911865f16
font_01_sfnt_off00006952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6952 10916 bytes
SHA-256: 6465a22546f63e97e0ec2da59d1af563d970ccd8d8d881c58a89ca109bc799a0

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