Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b9bbefb6fb21d5…

MALICIOUS

PDF

43.0 KB Created: 2020-08-21 07:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7e0481085db3e4d26f214ecb042424d0 SHA-1: b2f233dd85bfc3bc44ec0926b64cde7c947a3aa8 SHA-256: 98b9bbefb6fb21d5186457ae8df645f4d8db06c93f2d38c076af95efad236b20
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=waves+hair+meme+template In PDF document text
    • http://lunezofo.maxhamhypnosis.com/uploads/1/3/0/7/130775626/fumizegetu_suwifibunusejep_tiwulo.pdfIn PDF document text
    • http://files.cirrusskyfarms.com/uploads/1/3/1/4/131408280/3194b7e6c239e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82973104521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/zobaduviwusofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2602/2554/files/jowawokajebibewojumuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9019/0248/files/binaural_beats_concentration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5782/3390/files/mercedes_a_class_2020_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5693/8646/files/lefukamugura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2685/6610/files/86550569986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/63919413166.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_off00005d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D87 4704 bytes
SHA-256: cf73b800db52fe55fb2f657f2b96e379b597b366301e8f1f13d8b3793946906b
font_01_sfnt_off00006d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7B 10488 bytes
SHA-256: 45195af5fc8d1c4066fe5af2d9f7072cf05f811a40f48f8bd1817ef476d0e237
font_02_sfnt_off00009142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9142 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34