Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d4e04c4d9f51cdd…

MALICIOUS

PDF

37.8 KB Created: 2020-07-28 10:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cc9695252a3b8154b15df1b031fe88c5 SHA-1: 1921ce161c3087758adaacb351897568d3d660c4 SHA-256: 8d4e04c4d9f51cdd42f557c1218865482492b446617680b5fbe30be67aa0002a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to 'Vfs austria visa application form'. The PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, likely for SEO manipulation or to host further malicious content. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=vfs+austria+visa+application+form In PDF document text
    • http://files.azeetanielsen.co.uk/uploads/1/3/0/8/130874501/peraxaso.pdfIn PDF document text
    • http://files.nedmechurch.org/uploads/1/3/0/7/130739776/8604295.pdfIn PDF document text
    • http://files.a-mfoundation.com/uploads/1/3/1/1/131163902/lokoju_zofenitikipulu_gosuxejeki_damulewaj.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/1/0435/8579/8301/files/94610625582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4317/6091/files/21412099310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2725/9811/files/33430596036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/muvowojavobej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/dujodazusamavurategi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5738/9472/files/31131911179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8930/4477/files/26460828422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/69954900919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4332/2016/files/92155332004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2791/files/13446259066.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000586d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x586D 4948 bytes
SHA-256: 77679c3998d25a96f785cf7dd948e1f007ca6e0beba6b0e14441b0e6de684858
font_01_sfnt_off00006922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6922 9648 bytes
SHA-256: 4b8195120aa67af2d6d7c5f74ba38ec611fb083feb1cc1557083f0d360e3c9fd

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