Malicious PDF — malware analysis report

Static analysis result for SHA-256 83b707e597ebd0d7…

MALICIOUS

PDF

42.7 KB Created: 2020-07-31 19:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d8cd3add30d208926971b88515e05246 SHA-1: ab5d670b85d6edad3dbc26e01dd00c8e441830ae SHA-256: 83b707e597ebd0d7e44b2a68ba4081f6cac725ea4b8abbc5f373e1e19951219b
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a large number of external PDF links, suggesting a link farm for SEO manipulation. The document body contains a clear call-to-action for downloading a 'void launcher' and includes a URL pointing to a redirector, which is likely intended to deliver a second-stage payload. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=void+launcher+download In PDF document text
    • http://files.johnmccrea.co.uk/uploads/1/3/1/4/131407227/0c21a3e98fea3d.pdfIn PDF document text
    • http://files.vickylneal.com/uploads/1/3/0/8/130813055/rofumam.pdfIn PDF document text
    • http://files.highmarkcompanies.com/uploads/1/3/2/3/132303209/2345962.pdfIn PDF document text
    • http://files.paterpaulus.us/uploads/1/3/0/8/130873791/taxutef.pdfIn PDF document text
    • http://files.ctkinggladwin.org/uploads/1/3/1/6/131636862/gigex-fogobaro.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/1/0436/4324/0606/files/dedosulojojog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/71435734465.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/xozav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/durusibowipeze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/junubojidodarepuneg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/rurunugis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4248/5910/files/4812974163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6520/5141/files/xadukafomobaxokonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/98319214304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/89191283758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/ratexojegupuguvajipawut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8343/9003/files/91479798888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0486/0328/files/77379832507.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
🗂 Part of campaign: highmarkcompanies.com 4 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6A 4904 bytes
SHA-256: 4c0e555396d1e46830ce07b1c668259fea1a7bccdb3cf1b4d6021272434ef8ba
font_01_sfnt_off00007b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B22 10096 bytes
SHA-256: 46a1a48d127011a807c1cbd0d599f5c447c97bf9f312af23afe34ad85286954b