Malicious PDF — malware analysis report

Static analysis result for SHA-256 18ca3ddbe57d0400…

MALICIOUS

PDF

40.1 KB Created: 2020-08-23 11:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4a4b999de9a60d8ea083d0699a3d3b2c SHA-1: b4cfea15c3c052cd84b62173b96fbfd0eafaa12d SHA-256: 18ca3ddbe57d04008a2b4fcb87aafad99eda26a6e55e9491e3232f3911e0949f
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.ru/pify?keyword=visiting+card+making+apk In PDF document text
    • http://sudunesa.thequestofjz.com/uploads/1/3/0/8/130814229/koninoxawibipop_bakukarelema_sukadawilex_bipadozebozoga.pdfIn PDF document text
    • http://files.dccharms.com/uploads/1/3/1/6/131606630/jubabibewukeras_dotabir_liwadipod.pdfIn PDF document text
    • http://files.emmalucyillustration.com/uploads/1/3/2/3/132302710/dejokodewijaf.pdfIn PDF document text
    • http://files.artsphynx.com/uploads/1/3/0/9/130969306/4782945.pdfIn PDF document text
    • http://zozeja.thesocceridcamp.com/uploads/1/3/1/6/131606419/tiximazosedokisufi.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/1/0429/2762/0249/files/souad_brule_vive_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4311/0555/files/tetamexerumakedodagep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4909/8148/files/55795395996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0742/7238/files/wejufino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2528/5791/files/41406087125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4527/3248/files/96794796535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1970/6273/files/psychology_tools_behavioural_experiment_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/60425737058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/collins_english_for_business_speaking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0247/8237/files/adobe_photoshop_cs5_free_filehippo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2190/1729/files/association_of_former_students_tailgate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/81733510283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0146/files/67600263947.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_off00005dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBC 5388 bytes
SHA-256: df2799f45b1e9a53552b84e1b4b9694c44053095c89c858f1c4030300ba67ebc
font_01_sfnt_off00006ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF9 10392 bytes
SHA-256: f1e718fb42361586bf9f2753d8dcc1c55c6dd0ba406517a3ac60e052858a5fb3

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