Malicious PDF — malware analysis report

Static analysis result for SHA-256 a279d0e68ac7f118…

MALICIOUS

PDF

45.4 KB Created: 2020-10-04 04:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 6d40354d9ffd6888557c209c4b613d83 SHA-1: eed08dd4f0c6b72faefdbb96d5ff614d778b35d5 SHA-256: a279d0e68ac7f118c0c8fd5e3612c5a47701f8a82e7d8aef55fb1b73b7b1ec91
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://cctraff.ru/strik?keyword=therapeutic+diet+pdf In PDF document text
    • http://files.rafwestraynhamassociation.org/uploads/1/3/1/3/131383283/bce2c74.pdfIn PDF document text
    • http://files.monaghanmentalhealth.com/uploads/1/3/2/7/132740285/364363.pdfIn PDF document text
    • http://files.konstantinvalchev.com/uploads/1/3/0/8/130874478/jevafolag.pdfIn PDF document text
    • http://nowun.altogetherbeautifulblog.com/uploads/1/3/0/9/130969933/68d4388843359f.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/1/0499/8637/1752/files/94686167944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5557/9046/files/2837536747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3655/2611/files/joxozivuzipipedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6825/6167/files/4k_hdmi_splitter_best_buy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/earths_layers_foldable_question_sheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9800/8472/files/ecology_practice_questions_1_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0645/2131/files/zaduvukebolekameb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1601/3982/files/fairy_tail_vs_one_piece_1.1_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/eyes_of_nye_pseudoscience.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/maze_runner_book_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3589/2639/files/england_in_1819_theme.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_off00007517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7517 4980 bytes
SHA-256: 550b1e7388f1e2cdc4866a7f342ae82f4b491a6b09eb942f9b87fb473c9a41cc
font_01_sfnt_off00008603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8603 10308 bytes
SHA-256: 579b0b5e61dd15e6c5cc2afeb67bad3b8a530d28c815a4694bb864103f8f0888

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