Malicious PDF — malware analysis report

Static analysis result for SHA-256 880eb196b3b7fd10…

MALICIOUS

PDF

39.0 KB Created: 2020-10-03 13:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e9277d2f6c1541368c531890937b6a6e SHA-1: ede2ead12d53596564cd325ace4ba77d33ef53c1 SHA-256: 880eb196b3b7fd10dc45a2e5ef80cff7e81844326697f9c50f3c1f2d16a194f4
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=libro+muralismo+mexicano+pdf In PDF document text
    • http://felope.waterfordataberdeen.com/uploads/1/3/1/3/131378816/begenagosam-xafisuf.pdfIn PDF document text
    • http://files.charmvilla.com/uploads/1/3/1/4/131438641/gelone-nakefit-midobug-xefediru.pdfIn PDF document text
    • https://site-1037228.mozfiles.com/files/1037228/pukufasamujuzexi.pdfIn PDF document text
    • https://site-1038765.mozfiles.com/files/1038765/6110654309.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/39837369230.pdfIn PDF document text
    • https://site-1036840.mozfiles.com/files/1036840/pelodavarifusakonerat.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/1/0478/9783/7734/files/38188555709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9839/9139/files/87307859791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7106/5250/files/panuxukufevipoxapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2657/7570/files/61056347409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/0576/7590/files/declaration_of_independence_internet_scavenger_hunt_webquest_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0810/8955/files/colles_or_smith_fracture.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_off000057b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57B7 5448 bytes
SHA-256: ff1eadfeb41fbb830fbad4b40b3a813d0c36732364d4a80a15508f53284cf7fb
font_01_sfnt_off00006a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A26 11004 bytes
SHA-256: 344fc72b227c1a23ab1337d025b835d65b1dd903e605f0844f129092acedef8f