Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb3635b9bd76ffe…

MALICIOUS

PDF

34.7 KB Created: 2020-08-07 08:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 294667647175cba6158d12451ab35bf8 SHA-1: aaee7a7dc209540ec6a2981ed3d8fcaa2b27c385 SHA-256: 3fb3635b9bd76ffe720b734226b0baba21eb1ac5a62649d87420f6fd1999eb07
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a link to a PDF about 'Par biomagnetico isaac goiz'. The document body is heavily obfuscated, but the presence of the malicious URL and the PDF_SEO_LINK_FARM heuristic indicate a likely attempt to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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=par+biomagnetico+isaac+goiz+pdf In PDF document text
    • http://files.theyogaofresonance.com/uploads/1/3/1/4/131406154/5591891.pdfIn PDF document text
    • http://files.bgshelterpets.com/uploads/1/3/1/4/131407369/xogul.pdfIn PDF document text
    • http://files.olgaandflo.co.uk/uploads/1/3/2/7/132712282/637aa5c71085.pdfIn PDF document text
    • http://files.yourwayweddingday.com/uploads/1/3/2/8/132816041/nugurovo-rumiseponafoj.pdfIn PDF document text
    • http://files.nayastergiou.com/uploads/1/3/1/4/131483305/534c675d60.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/1/0433/5294/8901/files/essential_calculus_early_transcendentals_2nd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/26575931087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/26147609158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2538/3073/files/tinif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5814/2120/files/91947700360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6768/6558/files/rubesimiveri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7184/8100/files/19849630833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9052/5849/files/vopulirefolovigukuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/wetatonaravunifusixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/gezenebezur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8987/0491/files/17900449034.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 5

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_off000048b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48B4 5632 bytes
SHA-256: a5d87a02859bf3f05911907fc4547a560fcb2cfc922ed032e63e0a52085b6e7e
font_01_sfnt_off00005bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCC 10064 bytes
SHA-256: d287654659015f795c903f9f2ba35001142f270d2dbf75f28751f03493c28ac8

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