Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce431720057c9cdb…

MALICIOUS

PDF

70.4 KB Created: 2020-10-16 07:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a664d7aa343dee460cdde7fc85cc63c1 SHA-1: e31286966782fa504d40c04454d4fc101c1b9465 SHA-256: ce431720057c9cdb16bbf31c45e7491a7504a092d21f39240c042504c3bcfb9a
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=reincarnation+and+karma+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_5f88a9680e53f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f87f4286f4bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f872d1c7b87a.pdfIn PDF document text
    • https://site-1043437.mozfiles.com/files/1043437/wezekorugiriladodafek.pdfIn PDF document text
    • https://site-1039456.mozfiles.com/files/1039456/54135886746.pdfIn PDF document text
    • https://site-1044455.mozfiles.com/files/1044455/luzokobita.pdfIn PDF document text
    • https://site-1043160.mozfiles.com/files/1043160/21721304014.pdfIn PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/1454232.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/7061675.pdfIn PDF document text
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/fobevuw.pdfIn PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/7031300.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/210815b6d.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/1/0266/8527/6348/files/story_map_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4047/2229/files/bometozezuwiwufofof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6703/8613/files/farmacologia_rang_dale_ita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1246/7106/files/suzuki_eiger_400_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/the_mastery_of_love_by_don_miguel_ruiz_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1907/8301/files/louis_le_vau_biography.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_off0000d4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F5 5164 bytes
SHA-256: 2a0a20e1280ed1ae20794e7a39643971d2e84614a6000774e64027b7233e4222
font_01_sfnt_off0000e672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE672 11076 bytes
SHA-256: 0d4d85947cd670b4ed94c82cadc740bd947b5b75510916cbd5267aff821023c9

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