Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf57feeb53e1b41e…

MALICIOUS

PDF

43.1 KB Created: 2020-08-04 16:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4405dc8066f02de7a87f18005100a3f4 SHA-1: e21a8390d73ac0bd7acf1a75dff1e539be269770 SHA-256: bf57feeb53e1b41e9e9620a6c1737fd0026f7df75c05d422d79324a3ccb8bf2a
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'catheter related bloodstream infection pdf' and a URL that appears to be part of a link farm designed to manipulate search engine results. The primary malicious link redirects to `https://ttraff.cc/pify?keyword=catheter+related+bloodstream+infection+pdf`, which is a known malicious redirector.

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=catheter+related+bloodstream+infection+pdf In PDF document text
    • http://files.cenutrifit.com/uploads/1/3/1/4/131453284/14d47c0a38e0b3.pdfIn PDF document text
    • http://files.turtlebeachpc08.com/uploads/1/3/1/4/131453574/9827750.pdfIn PDF document text
    • http://files.bradleyestates.co.uk/uploads/1/3/2/6/132682570/wirifobeje.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/1/0432/0477/1999/files/31733058338.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1778/9863/files/sunumubila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1644/4311/files/sesisozapelolufese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4079/2999/files/62182571215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9770/1032/files/fifobolibeponopefarol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6951/2607/files/fipekeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1983/7346/files/wojirij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/witeluminobol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3323/9457/files/37830627094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2704/6298/files/12867820407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/49814769279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1045/6730/files/roxio_vhs_to_dvd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/sunifaruborawomoma.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_off00006af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF1 5440 bytes
SHA-256: 8c98fbb6e0a94e04d13eb07e4d5db7244c78c98f343068c31e096a38e904553b
font_01_sfnt_off00007d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3A 9900 bytes
SHA-256: 65f45d5eb3c565a22609e746f15c4179b305c4b759c306b88c77b682416a49c5

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