Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff4d0da85cfac42…

MALICIOUS

PDF

57.7 KB Created: 2020-09-30 14:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 30182c8bf3f3a387c9e56c1b3340541c SHA-1: d081dd4c09e27ab51596fe815b70a178f6691e63 SHA-256: 6ff4d0da85cfac42b8c05b1fc7f2c6cbf0fbe12c0b38bb3ebb97883070749ce9
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=add+png+to+pdf+java In PDF document text
    • http://files.100lifelessonswithsistergirl.com/uploads/1/3/2/7/132740949/22dbdad4499a.pdfIn PDF document text
    • http://lanojevir.georgepachecoart.com/uploads/1/3/1/8/131871486/ludagazumasudon-nifowogakapeki.pdfIn PDF document text
    • http://files.smithandwebb.com/uploads/1/3/0/7/130738911/janipipibijer-mavupofuzezul-tenovitole-tepivepi.pdfIn PDF document text
    • https://site-1036855.mozfiles.com/files/1036855/mewididodajexabeg.pdfIn PDF document text
    • https://site-1037149.mozfiles.com/files/1037149/nawutexomubexezifovukewib.pdfIn PDF document text
    • https://site-1037235.mozfiles.com/files/1037235/juxamezufijudivad.pdfIn PDF document text
    • https://site-1037275.mozfiles.com/files/1037275/57516670078.pdfIn PDF document text
    • http://sapamatof.arewordinglife.com/uploads/1/3/0/7/130739561/926fcd30061c0.pdfIn PDF document text
    • http://ligaxonuw.lifeandmusic.org/uploads/1/3/2/6/132682555/613eb96cf7f6ac.pdfIn PDF document text
    • http://files.stevediller.com/uploads/1/3/0/7/130739112/jewajilimokaxi.pdfIn PDF document text
    • http://files.lbcmetz.com/uploads/1/3/1/8/131872298/aa97019af1abc1.pdfIn PDF document text
    • http://mupetogas.deftspacelab.com/uploads/1/3/1/1/131164573/d20318.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/1/0431/7757/4557/files/34949093514.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/13486409907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/bebonabajete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3395/0358/files/55225944280.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_off000090f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90F6 4648 bytes
SHA-256: 097503208b6c11456512dc22170f0a5ed1fa4c87ff94b38f30a6bce41cf847fb
font_01_sfnt_off0000a0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0E7 12824 bytes
SHA-256: 88a95e3a5913ff352795d6cd1e829129636b3bb7df59cd224623d9029742df44
font_02_sfnt_off0000cbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAB 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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