Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a75587d35882d6…

MALICIOUS

PDF

46.3 KB Created: 2020-11-01 19:17:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 113b4e2ac0c7f4ee7e84eae79ce02969 SHA-1: 9641caa1abae5300ed984f6eb7c512b5dd9cfaa4 SHA-256: c0a75587d35882d68c68327feed619ba6cceb35a13b58c0a9249095d83ed065a
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.com/123?keyword=adjectives+that+start+with+h+about+a+person In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406170/normal_5f96a0b6bc64b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f892ebce30da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5f88b6766f727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_5f8fbeda57319.pdfIn PDF document text
    • https://zavigajigufuf.weebly.com/uploads/1/3/1/6/131637719/jizitotevaw.pdfIn PDF document text
    • https://nakumupapetiz.weebly.com/uploads/1/3/2/7/132741615/1704af0fd.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/1/0483/1117/3275/files/fufikoteb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/5379/8319/files/gibiwesavazukijo.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/vamajokugupenad.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/whatsapp_download_apk_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/7740/3292/files/10647638731.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/blkoviny_chemie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3754/4607/files/23676685284.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/government-wide_financial_statements.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4971/2807/files/bloons_td_battles_powers_guide.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_off0000749f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x749F 5484 bytes
SHA-256: 2ae7d43296a96cb23d17b298461123bff84ebbe1060c78f451905628c7935afe
font_01_sfnt_off00008756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8756 10984 bytes
SHA-256: 48155c5c89ca8b7c1365730d036d0196b29a5511eaa7127e5665c7cbd9a33f0d