Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bbac52bb0827cde…

MALICIOUS

PDF

62.3 KB Created: 2020-09-09 15:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2e927032961a1afb66094cadbe72cdb9 SHA-1: bbb3b86a2430820198f4314746e47bf358bac5d8 SHA-256: 3bbac52bb0827cde98b56cd54fd6f3edc9a5766e6acba374cd37a90b1f80f32e
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/wix?keyword=minecraft+1.+8+8++mac In PDF document text
    • http://nebaki.relaxandsucceed.net/uploads/1/3/2/6/132695384/823307.pdfIn PDF document text
    • http://jevep.carnegieartcornerstones.com/uploads/1/3/1/0/131069839/4393746.pdfIn PDF document text
    • http://files.carlylelabuschagne.com/uploads/1/3/1/4/131406893/vakolurelebuw.pdfIn PDF document text
    • http://rikonef.ginadvisor.net/uploads/1/3/1/4/131438316/ccc47a.pdfIn PDF document text
    • http://xamoxa.risingtidelabradors.com/uploads/1/3/2/6/132682787/7676224.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/1/0437/6412/1749/files/new_language_leader_intermediate_coursebook_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5029/4687/files/17201061966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0158/5569/files/kuxitijul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/cannibal_corpse_butchered_at_birth_album.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/wimikivopowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2449/8333/files/34727153675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/4869/7757/files/acland_anatomy_upper_limb_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/25408915213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/3475/7531/files/language_activities_for_kindergarten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7074/2690/files/nexamoruzexug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0361/6165/files/widowep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8514/3965/files/equifax_credit_report_dispute_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2702/7352/files/gugit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9058/2427/files/non-_mendelian_genetics_practice_packet_answer_key.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_off0000add7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADD7 5100 bytes
SHA-256: 2b8ae16d749b51c2e49ff586169006ada307873d0e118c5061a2b3a9a2088868
font_01_sfnt_off0000bf38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF38 14340 bytes
SHA-256: cd3a3d184e419d0da9af3d98619773d01fd1a4dd924be590d6e960fb6b85af51

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