Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6345bdb1eaee6eb…

MALICIOUS

PDF

45.1 KB Created: 2020-10-24 08:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 2d1aa5f18a23f5b141bd578357f0a873 SHA-1: 4ef187761148dee4665077d3baf806334f100a22 SHA-256: c6345bdb1eaee6ebf1d333c56ea83bb80396c9b3a23a5633656f24404de6c7f9
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.link/pify?keyword=international+accounting+standards+1+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f8aaec6e4ce2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5f928ce35ca19.pdfIn PDF document text
    • https://giledaxije.weebly.com/uploads/1/3/4/3/134312043/7529839.pdfIn PDF document text
    • https://bafuvaki.weebly.com/uploads/1/3/4/3/134336870/531f987.pdfIn PDF document text
    • https://legunumazonum.weebly.com/uploads/1/3/4/4/134455594/roteludefixaxo.pdfIn PDF document text
    • https://febukorev.weebly.com/uploads/1/3/4/3/134325382/d29eaf9051ab5.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/62359cebce6.pdfIn PDF document text
    • https://xezinazilasiza.weebly.com/uploads/1/3/4/3/134319357/juguzixipojadat-lerejugamifa-guvokof-tiwosowanot.pdfIn PDF document text
    • https://mizunilido.weebly.com/uploads/1/3/4/3/134352057/44879b939cb6a.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006ebb.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006ebb.bin)
    • https://cdn.shopify.com/s/files/1/0499/5199/8101/files/zombie_apocalypse_mod_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5122/4735/files/68534168598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8509/7877/files/morcheeba_enjoy_the_ride_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1103/5295/files/mapafunudiwonatowida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3142/8248/files/acini_de_pepe_noodles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8093/4087/files/18174984433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0334/5559/files/fakezademixalawinezozanir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2281/0268/files/heritable_and_inheritable_definition.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_off00006ebb.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBB 5312 bytes
SHA-256: 0ffbdae695a866858ac7efb95434748d384396e1ad834bfef6f5943fc04412e8
font_01_sfnt_off000080db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80DB 10548 bytes
SHA-256: 503f5b3bdc01540285f3fc904b9903780d3ad4caa9cbf785d2454d95bf8b366e