Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd6d04cacdb65e3d…

MALICIOUS

PDF

38.4 KB Created: 2020-08-23 06:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 03bf86e82b03e914dc2eb797d641f738 SHA-1: d266eb56ca24232d24645df9727fd09e4e8d078b SHA-256: fd6d04cacdb65e3dc73acb7acc24f69679b37f8c115d11b0c44fdca755f3c41a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body is heavily obfuscated but contains the primary malicious URL. The presence of a large number of external PDF links suggests a link farm or SEO poisoning tactic, likely to drive traffic to malicious sites or to obscure the true malicious destination.

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=reporting+contingent+liabilities+gaap In PDF document text
    • http://nuzodape.jjohnsonartist.com/uploads/1/3/1/6/131606295/cd7dd.pdfIn PDF document text
    • http://files.pacificbrows.co.uk/uploads/1/3/1/4/131454286/3c8bdf7478116.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/1/0435/4313/4362/files/3d_max_autodesk_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6732/6110/files/luwanuwoxigele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/56406570069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/3328/0921/files/xerelezijisutarotunixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6428/5598/files/jegadigijebubepijarezufut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/tizoketazedozum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0225/5770/files/fuwirazoxowivuxonipidob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8562/6528/files/postknight_guide_stats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/sumefad.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 8

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_off00005937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5937 5248 bytes
SHA-256: a5f63c352fc8d602e585dfc5d0617a4db70907e532edafff6bccc8cafb4d8e6f
font_01_sfnt_off00006b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B24 9892 bytes
SHA-256: 869030c892a7a55e76f20877b0bdaef194355bdb61149fdd68a41a353fbf12ca

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