Malicious PDF — malware analysis report

Static analysis result for SHA-256 e31197eb11654cd9…

MALICIOUS

PDF

40.0 KB Created: 2020-10-09 12:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: c56bad8be581c9737a62ab5982be806f SHA-1: f9ab53d8ff4be52ccb4a04926f5c104e6e546b79 SHA-256: e31197eb11654cd90cd7091da3414fffe47df3d2abfc08468595cae18b891869
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://cctraff.ru/strik?keyword=trd+shift+knob+frs In PDF document text
    • https://site-1037024.mozfiles.com/files/1037024/73602898649.pdfIn PDF document text
    • https://site-1036811.mozfiles.com/files/1036811/wugigenamemusibomivevif.pdfIn PDF document text
    • https://site-1036655.mozfiles.com/files/1036655/44791821357.pdfIn PDF document text
    • https://site-1037189.mozfiles.com/files/1037189/50385935878.pdfIn PDF document text
    • https://site-1037115.mozfiles.com/files/1037115/99274927907.pdfIn PDF document text
    • http://files.jvincentwalsh.com/uploads/1/3/1/4/131409037/kesawopupepazinejuv.pdfIn PDF document text
    • http://files.militarylawpro.com/uploads/1/3/1/1/131163613/9287811.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/1/0481/3124/4195/files/tupogunebilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/snapchat_friends_list_not_loading.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1248/8343/files/63856904601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7650/1148/files/48214140510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8133/7506/files/52677557240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/backpage_ad_posting_software_free_download.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_off00005f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F60 4904 bytes
SHA-256: 082c272ac8a469ddd08937f8c4f5d6d0a52792d478c7bb47518fe0e13716e79d
font_01_sfnt_off0000700a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x700A 10428 bytes
SHA-256: 7cc0c61bec4df69df7190ea0753d842dd60c36a071354ee9676f7bde6014e997