Malicious PDF — malware analysis report

Static analysis result for SHA-256 08abff9d2daf43d8…

MALICIOUS

PDF

36.8 KB Created: 2020-08-21 02:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 02e7df6bdbaf0d0751bf2f1f40f04d38 SHA-1: 26f9a540492c4909c6f87a1a9bcb5ea0f5faff95 SHA-256: 08abff9d2daf43d8e1951e33e4867071bd604d13992f8ce438a688e122631adc
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.ru/pify?keyword=datasheet+capacitor+104 In PDF document text
    • http://remilede.bryant-ratliffbuilding.com/uploads/1/3/2/7/132741066/romanatemufe-nuzizesomo.pdfIn PDF document text
    • http://files.ppncenter.com/uploads/1/3/0/7/130775969/vejuriju_bomem.pdfIn PDF document text
    • http://files.kawvalleyhearing.com/uploads/1/3/0/7/130775784/relulof.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/1/0428/8937/9993/files/50398790948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/kudogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/fafulopejigapodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9820/1502/files/24977146554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/4442/9984/files/beef_tongue_nutrition_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3926/8765/files/fagawuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1685/5457/files/25317666949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/jquery_change_text_color.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0931/8813/files/29064566537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5171/8558/files/68494800933.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_off0000513b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x513B 5268 bytes
SHA-256: 940a1c6b73988339f2a215d1e84cd36fef949470cf43fdca50762474436b7c7b
font_01_sfnt_off0000632c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632C 10512 bytes
SHA-256: 6a64aff6e706c8391b993c33f34f8c0e83e70ab22d1601e2ac706b682805121a