Malicious PDF — malware analysis report

Static analysis result for SHA-256 636835b2d97b8ad0…

MALICIOUS

PDF

38.0 KB Created: 2020-10-07 01:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1c6da5f8638479f7d3c7b14a37f4d5db SHA-1: e0be22c775bf7b1b3404286789f4913b9ecbbc33 SHA-256: 636835b2d97b8ad066c54c0333298c420a9a9e9c8e1fc5fd8d070d4ba2b0f640
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/strik?keyword=titan+quest+runesmith+build In PDF document text
    • http://files.treignathletics.org/uploads/1/3/1/0/131070561/zosofefe.pdfIn PDF document text
    • http://files.samanthajeankosakowski.com/uploads/1/3/1/4/131411542/414566.pdfIn PDF document text
    • http://vutodig.heykatedewey.com/uploads/1/3/2/7/132741194/busine.pdfIn PDF document text
    • http://lewixa.washingtonactivities.com/uploads/1/3/2/3/132302926/sipigewepoxa-gogakumofexoji-visase.pdfIn PDF document text
    • https://site-1038789.mozfiles.com/files/1038789/xedivijojufizowupi.pdfIn PDF document text
    • https://site-1041384.mozfiles.com/files/1041384/sulefizunizeze.pdfIn PDF document text
    • https://site-1042185.mozfiles.com/files/1042185/zumumidubenolorebexitamo.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/1/0488/1881/5141/files/city_of_madison_streets_division.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7348/2133/files/pitomesifoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7405/0458/files/dekivubob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4726/3131/files/consumer_behavior_solomon_12th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6932/8548/files/aha_provider_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9464/4638/files/67621844716.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_off000055e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55E9 5280 bytes
SHA-256: fc708d43d8fc387fe8bea20e7914cf0ab6dd71ce52745691dcba6c3fbb53e5ad
font_01_sfnt_off000067a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67A6 10464 bytes
SHA-256: 69b397dfb09859a3c6413fe0ac643f92d706c3938ba34297240ed2735f55d27a