Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d35a494c7c85fa…

MALICIOUS

PDF

42.1 KB Created: 2020-10-02 19:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: c3f32d30fbaf5fa8c06ff4afe6cd4ea0 SHA-1: 588a52b66994747f596b25d81c3deb8d32faf8ef SHA-256: 88d35a494c7c85fa497e30683ae60afcea84973fb2c2d977f9774c9cf48727df
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=katy+perry+never+really+over+sheet+music In PDF document text
    • http://files.salmonfallsgardencenter.net/uploads/1/3/0/8/130813466/luvigerikir-muwamawogetozol-dopabozu.pdfIn PDF document text
    • http://files.biddylids.com.au/uploads/1/3/2/3/132303163/xidekin.pdfIn PDF document text
    • http://files.airbrushartstudio.com/uploads/1/3/0/7/130738823/4933343.pdfIn PDF document text
    • http://files.opeiu-local2.org/uploads/1/3/2/6/132682925/6333719fd6.pdfIn PDF document text
    • https://site-1037081.mozfiles.com/files/1037081/bamodezixedu.pdfIn PDF document text
    • https://site-1037246.mozfiles.com/files/1037246/makirazejugutegep.pdfIn PDF document text
    • https://site-1036751.mozfiles.com/files/1036751/wesazazofu.pdfIn PDF document text
    • https://site-1037245.mozfiles.com/files/1037245/dofum.pdfIn PDF document text
    • https://site-1039707.mozfiles.com/files/1039707/93465104814.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/1/0436/1453/5843/files/planet_fitness_lunk_alarm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1844/7771/files/what_do_stripe-tailed_scorpion_eat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1889/7573/files/how_to_spell_80.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/38727179030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0470/5851/8184/files/49912721769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6081/7820/files/binary_covalent_compounds_worksheet.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C7 5304 bytes
SHA-256: 00275e7eaba5b051d75be151e0a8923416d7288741bfb0c3d87e35441e18081b
font_01_sfnt_off000076be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76BE 10856 bytes
SHA-256: c8835b9ee0fb38cfced64ccd55c028085edce8a86cdbb8f217ae9718e39b8841

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