Malicious PDF — malware analysis report

Static analysis result for SHA-256 8643aaf085784ea9…

MALICIOUS

PDF

42.0 KB Created: 2020-10-16 06:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 89402b557ed5f41ae5b8fa63dfb491f3 SHA-1: e8f17282e20fe7804c920ad6bc941f73e8ad2cf3 SHA-256: 8643aaf085784ea9ffd2c70079a5e0600360f343e0334832ffc1562a0e177c58
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://gettraff.ru/123?keyword=unblock+restricted+calls+on+android In PDF document text
    • https://kasukironumasex.weebly.com/uploads/1/3/1/4/131454791/sezaxaganepe.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/7414141.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/9897457.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/daxasolizi.pdfIn PDF document text
    • https://tudupumodowi.weebly.com/uploads/1/3/1/4/131406798/2766757.pdfIn PDF document text
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/lefugubufawetar_zenukopizat.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/kukuximesuxus_fizoluwu.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1392291.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/wikemowewoladoxuso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369520/normal_5f890632e0d28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f871801126fd.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/1/0484/9690/2294/files/fujitsu_scanner_6130_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9272/8226/files/61307085588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5135/1197/files/animator_vs_animation_card_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/8031/9645/files/cardiac_anatomy_and_physiology_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4622/4031/files/ridgid_framing_nailer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0754/3965/files/fundamental_statistics_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/6937/9238/files/80213651867.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_off000065ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65ED 5128 bytes
SHA-256: c6c0aa753e694d98dae6eaf119c5be775303c6325c79be75a7f9507e67cf130b
font_01_sfnt_off0000775b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x775B 10264 bytes
SHA-256: ce10f4b77b4801c58e62e5776dd9157e44362a5f43bdd135330e1fb4750a2066

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