Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd920a09d1e7dbb…

MALICIOUS

PDF

44.3 KB Created: 2020-11-02 02:03:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 44f8f1d87a0dfc5360e530b1e05f24a5 SHA-1: 2dceee3dfc332e3ced42a26bd85e847e47e97449 SHA-256: ecd920a09d1e7dbbffa2fd8e133bf9e7a221c805a915e7b8a6e3c70dc5c18399
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/pify?keyword=edward+rutherfurd+books+newest+first In PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/zasolu.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/movew.pdfIn PDF document text
    • https://zalawevovupat.weebly.com/uploads/1/3/0/9/130969727/sebobuzexikemade.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/3c431b0c.pdfIn PDF document text
    • https://bupiwuzisulim.weebly.com/uploads/1/3/0/8/130874125/lupidud.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/1/0508/1307/5614/files/funny_positive_short_quotes_for_kids.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/4626/9613/files/uc_santa_cruz_geology_graduate_program.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/componentes_inorganicos_de_la_celula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/9438/9151/files/merck_veterinary_manual_citation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/5688/6422/files/1158339249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8403/1162/files/how_to_use_manual_inflate_blood_pressure_monitor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1832/8508/files/64701412624.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/tewewemoliveve.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_off00006e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E94 5216 bytes
SHA-256: d52e2b6d0b4d5bbbfd79f6bf88d2813ddba69d1e608883f443ef0d7799f22b04
font_01_sfnt_off00008064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8064 11064 bytes
SHA-256: d87b6175bf8dd41b6f2355f8b922a626c7da289beeeb29e1f6f0123c361559c7