Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf47ab4883b3e4f…

MALICIOUS

PDF

37.8 KB Created: 2020-11-01 15:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-02
MD5: e085f48b524b0682d612dfa5c0b49735 SHA-1: e7d019936c6a840b3b4faa91c85324af440b51aa SHA-256: edf47ab4883b3e4f72e098b39f00a3f2e2c46a6bfa6b0c33245bf18b2f472700
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.me/123?keyword=lowest+price+for+ruger+mark+iv+standard In PDF document text
    • https://gexirirexov.weebly.com/uploads/1/3/0/8/130874239/fafanunafovaset.pdfIn PDF document text
    • https://dudumopovidin.weebly.com/uploads/1/3/4/3/134308156/difuwupedul_waruvivufuk_jifekebodu_tedagilalig.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005441.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005441.bin)
    • https://s3.amazonaws.com/pizivurapab/2931348976.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/2018_awards_current_affairs.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/bibusakakonut.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/black_leaf_bongs_amazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9921/2964/files/3021870582.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/el_son_de_la_negra_mariachi_vargas_de_tecalitln.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6542/4021/files/geviparu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/9347/3688/files/peremptory_norms_in_international_law.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4863/9907/files/melee_tier_list_shadowlands.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/60507573742.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/bitter_kola_health_benefits.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 extracted file (font_00_sfnt_off00005441.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5441 5600 bytes
SHA-256: da5368acc7696d77b32a802bd830c6b6e53239d03d2542ef3956e87dfa3acc28
font_01_sfnt_off0000675b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675B 10556 bytes
SHA-256: 086ca519a5f68301e2db998ac7e0c0fb7ed8a734f62a38e483cdd65d5b08b5c1