Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbb337e74ae0bbd8…

MALICIOUS

PDF

42.0 KB Created: 2020-09-10 07:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4812db695ac0911ae3042c68652565de SHA-1: b90c27a35e2930753fe83607436a6bc8de2cb44e SHA-256: cbb337e74ae0bbd87d2a105a070480f9c1238f7b0c5aa7ab7f6a8a5cf6c8b30e
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests the document is part of a link farm designed to manipulate search engine results. The embedded URLs, particularly the one leading to 'ttraff.club', are highly suspicious and likely serve as the initial lure to a malicious site. No scripts were extracted from this sample.

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.club/wix?keyword=electrocardiograma+pdf+interpretacion In PDF document text
    • http://files.starkeyspoint.com/uploads/1/3/0/7/130776573/d7f88ebe.pdfIn PDF document text
    • http://jaxuzop.lindenplace.co.za/uploads/1/3/0/8/130814328/zijoxaluf.pdfIn PDF document text
    • http://files.edwardbricerazors.com/uploads/1/3/1/3/131379039/nevaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/ee4d88_d3c7dbf5347e4838a423a21539a0a3ea.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/57c819_acdae27960b346858de1ceab039b7f0a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1df9ea_a7f6a66753cc45e6b4a513a1afc4894b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cec570_5808e85494d844feb06a2e16b3bb9950.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0d2908_404e4742ed2d420f884aac8b4e7484ff.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a3b54b_c8bb28cb26db4fdf851df2e65ff10757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8734/5304/files/ceratite_ulcerativa_em_ces.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8371/0117/files/68153690950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/wilanepuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1079/3370/files/vugobapire.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 6

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_off000065cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CC 5252 bytes
SHA-256: c9136e61f44fa4d102200834ebb25f65ded75e6531adedf23a3b833de233e84e
font_01_sfnt_off0000779d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x779D 10928 bytes
SHA-256: 13378790f913f5efac95c7af91803dbf9f7b6a1cfd4b80516520205798951841

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