Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be256af844f7dd0…

MALICIOUS

PDF

34.1 KB Created: 2020-08-25 16:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a5623873f43a7e0f400c89b8f01a70fd SHA-1: 2e426dba5fe3484acb792bea3b4aa9cb8f977d10 SHA-256: 4be256af844f7dd0def619f4e5eb89e812aabc78e65899d68a3254e1584065e6
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that points to a known malicious redirector, 'ttraff.ru', which is likely used to obscure the final destination. The presence of numerous links, many pointing to Shopify domains but with obfuscated filenames, suggests a broad attempt to distribute malicious content.

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=billian+billian+song++mp4 In PDF document text
    • http://joton.olgabaptist.org/uploads/1/3/0/7/130775565/xekanotudabefinapesu.pdfIn PDF document text
    • http://files.feehanonlinestore.com/uploads/1/3/0/8/130814926/vepezovubuwuwom.pdfIn PDF document text
    • http://xatid.marquettemissionary.org/uploads/1/3/1/4/131452976/lozisud.pdfIn PDF document text
    • http://files.stevenparrphotography.com/uploads/1/3/0/8/130815303/7055983.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/1/0429/7680/5018/files/gramatica_portuguesa_brasil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6360/7445/files/xegegabewabusejakojisefur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2157/4049/files/google_chrome_latest_version_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4673/0904/files/metformin_hcl_xr_500mg_side_effects.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3464/7445/files/psicologia_aplicada_a_administrao_de_empresas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0303/4276/files/mugijetavigizelanelekim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9109/0844/files/gulefukevekogexitom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/zener_diode_circuit_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/14996877014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7491/8302/files/94367391251.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_off000047a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47A7 5320 bytes
SHA-256: acfca79fe4b0cb4eab290551f42fb7c2a5b11da90edff55a96a1b6ef2417154a
font_01_sfnt_off000059ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59AD 10252 bytes
SHA-256: ae32f929cc8c70ea7abf8dcab5e16eaa085be87e23f31476b8f923d7e47a4736

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