Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3c51cfb0725ddc6…

MALICIOUS

PDF

46.6 KB Created: 2020-08-16 16:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a7fd877caa50e85b04ac41cb5d722b6a SHA-1: 5aaa4f61e8163c2ba21449caba5b2c450af52a71 SHA-256: f3c51cfb0725ddc661183aab51df74f4f12a1f1fd0eaad2cd7b6f05bc989027d
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to 'incident reporting policy healthcare' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer a malicious redirection attack.

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=incident+reporting+policy+healthcare In PDF document text
    • http://zetijaj.jessicafleck.com/uploads/1/3/0/8/130813528/4548024.pdfIn PDF document text
    • http://sepilowaw.onemoremiletraining.com/uploads/1/3/0/9/130969723/redoronitijumaxezuv.pdfIn PDF document text
    • http://files.charleesangelsboutique2.com/uploads/1/3/1/3/131398219/9801470.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/1/0433/7664/0156/files/nukutumoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/66361818051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5942/6968/files/arcadismo_projeto_medicina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0641/9367/files/93239203587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56346524494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6618/7176/files/17291352895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6689/2186/files/nedorebupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9307/1774/files/34919548595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/sezosibunapewifiniw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7069/3282/files/52203926490.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 3

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B46 4984 bytes
SHA-256: 8f4225899dcc28ff9021ff91e969a2fade3a8d2db95bb1339a2e7187630bd26f
font_01_sfnt_off00007c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C21 10444 bytes
SHA-256: b8a196d7f22ab61d3b10417e1913d7a70fe4f802597879765aae8097fab1cd8b
font_02_sfnt_off00009f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F6D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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