Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6c8593a8cdb46e…

MALICIOUS

PDF

48.7 KB Created: 2020-08-19 05:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6826c852388b79361e7cea837a4a7911 SHA-1: 2f34ea239bff9f335f657332ba8c620c89ba9c95 SHA-256: dc6c8593a8cdb46e9e8eada42f84c2b065c102d0b3827b874d9be8e0c6dd8f9a
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://ttraff.ru/pify?keyword=descriptive+words+list+pdf In PDF document text
    • http://nutunidi.thespiritualcentre.net/uploads/1/3/0/8/130814004/difipekaveta-lufafa-titabuma-dazake.pdfIn PDF document text
    • http://files.letsflytogether.org/uploads/1/3/2/6/132695321/xurebet-biduladoto.pdfIn PDF document text
    • http://files.donandrewsstudio.com/uploads/1/3/0/7/130739398/bonisejozakekigor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4399/3238/files/dezetapisanuvarekuborup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/5791/4523/files/talk_with_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2091/0746/files/lepukegevufabipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/xutavosorexiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3983/3767/files/community_service_log_sheet_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5063/0297/files/scansnap_s510_driver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/wagebezinixomavopik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8342/3128/files/medabijegumilitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4161/2199/files/72323697953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5086/6590/files/xetemixevim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ganisififado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/biludetejuvujatolometa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000693b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693B 4772 bytes
SHA-256: 929083396be8de5f9a17a552968b08b533effab0c1f7121a050233b8e9257b17
font_01_sfnt_off000079a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A0 15128 bytes
SHA-256: 373f8326dd04eb5d4978b86ee5e43ddc5059b938ee54d99d6ee8c1a5675e21a9
font_02_sfnt_off0000a7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7FF 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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