Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a04d436f38e1bb1…

MALICIOUS

PDF

53.7 KB Created: 2020-10-20 15:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: ef878f51623086e601ed92f7e2990bab SHA-1: 7528b5dcb310c9f3b11e63c641d87f01744bca02 SHA-256: 4a04d436f38e1bb12fa74f14a8ef478fc5f6d43418c2caba359624c579a33def
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.club/pify?keyword=cordova+android+manifest+permissions In PDF document text
    • https://zewubonorow.weebly.com/uploads/1/3/1/3/131398185/kewuxobukike-fivumowavenasiw-rulivutarakas-lufam.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/tusamuwuto.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/9b14549441c9.pdfIn PDF document text
    • https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/muradow_xojipiwigoluse_jubapimi.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/7989682.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/1/0503/8650/1806/files/gibaredevizifirufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/govefaxejosizibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0880/6045/files/93708721066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7853/7382/files/gospel_songs_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/national_appraisal_guide_for_mobile_homes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9306/4357/files/49007390769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9929/4363/files/vupulezoxenigomavet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4247/9007/files/31621946261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3897/3345/files/93217056467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5086/6590/files/eddy_current_testing_companies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7107/8052/files/the_veldt_discussion_questions_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/delete_twitter_history_android.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_off00008629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8629 5120 bytes
SHA-256: feba68280c89064b72e2d0ccb9bcd429c2a86de4de93d3b35c8c75aeb16dda71
font_01_sfnt_off00009787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9787 15088 bytes
SHA-256: f2fbf3f181a223a9068764ce49f0afe37e809884f12f32488c082c2f958196d4

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