Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6dd0e9590dbec4…

MALICIOUS

PDF

47.9 KB Created: 2020-10-25 03:06:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 926dc33a11be3f3f8cad100f7b78dc77 SHA-1: 32ba8e6b2f2e6133590aeb6ba101ec7716027247 SHA-256: 7f6dd0e9590dbec46b49ffd67d8c6f966ef36b3e666e251c7702bfbad09a4516
142 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bulletin+of+entomological+research+author+guidelines In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5f94a21d250df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377115/normal_5f89b843a584a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402517/normal_5f91fad82ad1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_5f939aba407bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382952/normal_5f94be9df2c82.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/sekoj.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/plastic_bags_should_not_be_banned_debate.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/1998_ashrae_refrigeration_handbook.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/loguzesuja.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/narib.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/vegajetelovezofetov.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/agricultural_marketing_reforms_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/99838565349.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/transcendental_meditation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/vebop.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/gegakulirezataf.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/intoxication_arsenic.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/beethoven_piano_sonata_23.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/20548515473.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/bsc_physical_science_with_chemistry_syllabus_du.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/96588152603.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_off000079bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79BF 5484 bytes
SHA-256: 6a2884ac3b212c4e2c8a08b0985392774efb720ea886db10530a71bcf1e18ede
font_01_sfnt_off00008c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3D 11200 bytes
SHA-256: affd98ccb2595b2b78d0d5aab507e60b117f5fd33bde643e950f7c52633a1f11

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