Malicious PDF — malware analysis report

Static analysis result for SHA-256 bffe0b483e6650ab…

MALICIOUS

PDF

54.0 KB Created: 2020-10-09 01:16:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 9e292e683ca3bf92f10392ac8bbab486 SHA-1: 69861256ca44a403c84a46119b1ee61aadb94013 SHA-256: bffe0b483e6650abff1f3a6cecf1620135b385a7228111128084fd91bc25b3ae
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/strik?keyword=apply+problem+solving+techniques+pdf In PDF document text
    • http://dagus.troxellsgarage.com/uploads/1/3/2/6/132681670/6584233.pdfIn PDF document text
    • http://files.baerbel-heine.com/uploads/1/3/1/6/131607522/guvog.pdfIn PDF document text
    • http://files.bluesology.net/uploads/1/3/0/9/130969591/9c85038.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/1/0483/2464/0932/files/amazing_spider_man_free_download_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6903/7980/files/did_jd_salinger_have_grandchildren.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4224/2709/files/drawing_of_a_dog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58dad8a2-5346-49c3-9f57-1008d70ea7f1/98786846519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64b21b83-0d37-4a8b-b6d3-d073286acba2/tewijegulunepavarime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84f86325-0d16-4e3f-b9cb-197689325ba4/tibovekudixojuvesejomuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc4e4a43-c9a6-453e-88f4-d55242e01d72/resagamamusimezadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aec07f98-889c-42f8-b9b0-ae9770421da5/28649313365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/125d834c-1b75-4a00-9a2e-c4ea870bc137/69502196035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a990336f-c87b-4e1b-ad25-9ce025cade6d/63379959580.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E49 5776 bytes
SHA-256: 878c03e17815d3865a5fdf0ce76c241827293a3d5c95545c2d24292b920d5027
font_01_sfnt_off000091d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91D1 10448 bytes
SHA-256: eacb471c78e1cf1f9ba3d2aed2efe27b9d7bfd2b108803c52852aac87cd82461
font_02_sfnt_off0000b55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB55F 16312 bytes
SHA-256: 975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15

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