Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd77d6702502865…

MALICIOUS

PDF

38.0 KB Created: 2020-10-07 06:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b085e232afaae5180fdbf5c9015fb183 SHA-1: 891fd40c6e354c1c9a4c9320b10e025d6664eed4 SHA-256: afd77d6702502865963ef3dfb476cf1d8c84b64abc7ae8a8f6c4ec6ed76436f5
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/pify?keyword=machine+liker+apk+old+version In PDF document text
    • http://zabepexux.ginigarrett.com/uploads/1/3/1/8/131871699/jusewagun.pdfIn PDF document text
    • http://files.hansenbuildrestore.com/uploads/1/3/0/9/130968943/vunezirujix-telexuz-gerid.pdfIn PDF document text
    • http://files.faithbridgeumc.org/uploads/1/3/0/7/130775796/8503630.pdfIn PDF document text
    • http://raderu.ninemoonsmidwifery.com/uploads/1/3/2/6/132681692/368f6b07a.pdfIn PDF document text
    • http://files.nhbea.com/uploads/1/3/1/4/131453713/bogut-zariretagi-fizikazefub.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/1/0486/4396/5086/files/table_saw_push_stick_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1491/6766/files/lopadusonotoxedulegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/4766/1980/files/the_young_elites.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4856/6938/files/how_many_hearts_do_crabs_have.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/dkny_golden_delicious_million_dollar_fragrance_bottle_amazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1631/3768/files/best_osu_song_packs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/this_modern_love_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1108/2912/files/giant_hogweed_plant_in_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a65129a6-ea64-43d8-b7fb-ac9e1a66356d/sikejafuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/462764d1-5216-4608-b337-db39960462b5/99128615014.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_off00004fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC1 5292 bytes
SHA-256: d4f5ff7d33179cd7ad48c6154099b850ac9526bddfc8b2e21e7e16dfcfeee92f
font_01_sfnt_off000061ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CA 13148 bytes
SHA-256: a2d9403c18f1b258655fb5e751afd52411e8273eba2aa8c24e797e218b30e02a

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