Malicious PDF — malware analysis report

Static analysis result for SHA-256 939b80a80fa50958…

MALICIOUS

PDF

41.9 KB Created: 2020-10-08 12:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e906986b8579e80b7ee2aefe74a377ac SHA-1: 9b06a89f6d43aa7e25aa3039f9ab6cc37b72d4e2 SHA-256: 939b80a80fa5095848ce11b30ddd5eae80e61767991835424b8d4e831bd735a5
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://ggtraff.ru/pify?keyword=drum+rudiments+pdf+free+download In PDF document text
    • http://files.morningstarbarnquilts.com/uploads/1/3/1/0/131070723/xezaxugi_nasopis_xunuta_nuxunej.pdfIn PDF document text
    • http://zobab.dondealmuerzo.com/uploads/1/3/1/4/131453540/c2410.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/1/0483/0285/0203/files/testo_247_reviews_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6631/7205/files/vinoxameramewavuziribo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8233/3851/files/tarorozaduwunodalivaleruk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9599/0175/files/ap_art_history_painted_elk_hide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7506/7297/files/xuxugonodojidoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4329/8207/files/23665473140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/6500/0103/files/format_raport_ktsp_sd_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8957/6607/files/nyse_stock_symbols_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8844/0213/files/honeywell_lr1620_installation_manual.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_off00006674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6674 5276 bytes
SHA-256: 7d870436bb7a7c9698b9279cc0c4cdcef5e0b09a8c416576df42f229562dca98
font_01_sfnt_off00007866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7866 10060 bytes
SHA-256: 1fdc70cac03c2d697083061178a89e57227bdd35caba1f6ec5ca0364cb745687