Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf3566914abc613…

MALICIOUS

PDF

48.7 KB Created: 2020-08-08 01:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 45bc784d8962d696738fe2717621f6d1 SHA-1: c4ceebe57dc1efd79dcf64a0449b880b50255b29 SHA-256: 8cf3566914abc613bed04ddcfa0ba2cade06a6a2a6baab8ed05079c4b99cbb94
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms or redirectors. The document body, though partially corrupted, includes text related to 'Berichtsheft vorlage wöchentlich pdf' and the URL 'https://ttraff.ru/pify?keyword=berichtsheft+vorlage+w%25C3%25B6chentlich+pdf', indicating a lure to a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of links to known malicious infrastructure.

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=berichtsheft+vorlage+w%25C3%25B6chentlich+pdf In PDF document text
    • http://files.cheyenne-stastyshyn.com/uploads/1/3/0/7/130775033/pavoje.pdfIn PDF document text
    • http://files.triciaandersen.com/uploads/1/3/0/8/130814205/c1a5623b0.pdfIn PDF document text
    • http://lijuroxo.iowaconcreteleveling.com/uploads/1/3/1/0/131070590/ziwozimugare.pdfIn PDF document text
    • http://files.whittonprecision.com/uploads/1/3/1/4/131438616/bfc001edcec7.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/1/0430/1612/6625/files/kutifojowep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6737/5770/files/91018701680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7261/8657/files/fovenifivin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5578/2819/files/zelefewesizizofezitoduki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3711/1973/files/22180482373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/68580008709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/81967834423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/wozujapotubikitenujuso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/94419077604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6716/3302/files/mobofusipigejiwusilini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/48547490227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1163/7401/files/64636389125.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6728 5756 bytes
SHA-256: e9789f9be737a8a45244a8935269b28021195891d99df85813fa5ede7aa9cf6e
font_01_sfnt_off00007a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A96 10916 bytes
SHA-256: ee33682abe0aa56b29a208da9a72d27400570db50fe4d417fb2f874b1abf396f
font_02_sfnt_off00009eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB7 16084 bytes
SHA-256: 9065dbc6154a30e064f5b750d4b12464706f21ef18449ce5c48e12724f01b265