Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8a3fcbfd1e35fe…

MALICIOUS

PDF

44.5 KB Created: 2020-10-20 05:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 444edc86bbf2d63e5857338eb9a6f01e SHA-1: 63a10f0fa31f352656e63f8d6c9629b4b9d69a58 SHA-256: ce8a3fcbfd1e35fe34679df8a3663d604d4cd72632e763ef3a16ebd62746a4ec
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.me/123?keyword=algebra+2+logarithms+review+worksheet In PDF document text
    • https://gobumireg.weebly.com/uploads/1/3/1/3/131383916/vuzutukirekugog.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/539333.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/xupurukomakufogo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f88ac148a591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382782/normal_5f8dc5fbba99c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383930/normal_5f8c16c1e4b90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f87a51c3814d.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/cafd84665a2f48.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/pulisewe.pdfIn PDF document text
    • https://funiwulew.weebly.com/uploads/1/3/2/8/132814073/7973492.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/9813bbed27610.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/batagebexi.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006eac.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006eac.bin)
    • https://cdn.shopify.com/s/files/1/0499/4246/2618/files/jufifixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3570/2949/files/67264071094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/future_progressive_tense_exercises_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9903/7089/files/zero_the_dog_tattoo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4246/2618/files/bdo_blood_gathering_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6089/8213/files/lutavupagotowugetiwexagit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/coc_gem_hack_no_verification_or_survey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5140/0391/files/zone_level_guide_classic_wow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7311cb6a-4986-4e18-9cea-7dec95f3018d/75955616935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/738973a1-1a37-4b72-97ab-ae2789e73693/zikiribup.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_off00006eac.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAC 5576 bytes
SHA-256: cf8c0d65ea959670731b6037590015e1120319706535482dab60e0373deae325
font_01_sfnt_off0000818f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x818F 10144 bytes
SHA-256: 419eeecece252df4a96f87d871a4fa2468b90224ee21f68ebcb796c396343b43