Malicious PDF — malware analysis report

Static analysis result for SHA-256 636bf7a1d1839f3e…

MALICIOUS

PDF

50.9 KB Created: 2020-10-02 23:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 33ac807ae375fb5dc5feb141c62e5580 SHA-1: 432299777ce14b493e3b51e08855362e16a399c2 SHA-256: 636bf7a1d1839f3eaa69718c65ddfb6ab974ef6a77597ad7f4722b5192c7d7ea
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/pify?keyword=best+torrents+20202 In PDF document text
    • http://files.phatplatter.com/uploads/1/3/1/4/131406506/nudun.pdfIn PDF document text
    • http://files.portlandraindance.org/uploads/1/3/1/4/131454305/fanezogokufakelela.pdfIn PDF document text
    • http://lekonis.triciavanoostveen.com/uploads/1/3/2/8/132815787/2f4c1a0b.pdfIn PDF document text
    • http://files.carinandbenblazer.com/uploads/1/3/1/4/131410234/nenitok.pdfIn PDF document text
    • https://site-1037103.mozfiles.com/files/1037103/lagekerikirew.pdfIn PDF document text
    • https://site-1037079.mozfiles.com/files/1037079/29754501031.pdfIn PDF document text
    • https://site-1039954.mozfiles.com/files/1039954/buxejexavifamosoxiwunofib.pdfIn PDF document text
    • https://site-1039391.mozfiles.com/files/1039391/52309989363.pdfIn PDF document text
    • https://site-1038526.mozfiles.com/files/1038526/5961082995.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/1/0437/1306/9210/files/behavioral_appraisal_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/83412242635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4453/1107/files/best_longboard_brands_for_cruising.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5495/9265/files/33407354550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5bf4358-8165-4132-861c-a7a4025d9fc5/36472955303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404ae375-3eab-4227-9044-0c87c1963571/bidareneje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1afe9d5-2d25-43f4-b17c-4c3ea4d4e541/xolojofonunegesukeku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f974ce-af48-4069-bea7-2458b663d36e/436791843.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_off00008ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE0 4760 bytes
SHA-256: ed527ea93378aee712b784c2dd22fbb750aa2133d31d34a1b8f71b8d90c9d7dd
font_01_sfnt_off00009b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B21 10392 bytes
SHA-256: 38946b150761320505119cdc9d70df4cdf61e269f5df9494f7b861cd0dd89dbc

Open this report in the interactive analyzer, or submit your own file for analysis.