Malicious PDF — malware analysis report

Static analysis result for SHA-256 416fdf94dc60d7d0…

MALICIOUS

PDF

39.9 KB Created: 2020-08-19 10:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e16c5758b57f5a0cf3e44cc2a8b76e1a SHA-1: 89c5d8b61da4d764965e47be41d9572e04987005 SHA-256: 416fdf94dc60d7d0a523c5e0a743527aa33f710860077b113f175f2e363b73ee
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a link farm with numerous external PDF links, suggesting an attempt to manipulate search engine results or distribute content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=activity+lifecycle+android+tutorial, which is likely used for phishing or malware delivery. The ML classifier strongly supports the malicious verdict.

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=activity+lifecycle+android+tutorial In PDF document text
    • http://files.vibrant-energies.com/uploads/1/3/0/7/130775980/pawanetamonuvisera.pdfIn PDF document text
    • http://jubafe.mdvcorp.com/uploads/1/3/1/3/131383309/junisano_sopebezolejumik_wupex.pdfIn PDF document text
    • http://jomaxob.shopmmarie.com/uploads/1/3/0/7/130776433/3dcf5eddcd2050.pdfIn PDF document text
    • http://files.proyectocubabat.com/uploads/1/3/0/8/130813953/9604443.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/1/0437/9102/4280/files/93391345267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1617/5263/files/material_ui_react_native_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/os_buddenbrooks_portugues.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9628/0983/files/astounding_science_fiction_october_1953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3777/4239/files/bardo_thodol_descargar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/webedudenopum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/reliability_centered_maintenance_john_moubray_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/cactus_club_cafe_menu.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_off00005d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D91 4988 bytes
SHA-256: 705ff528ddfca31ccdd61c8d687b17cf13786c726336120da53b821562c10b43
font_01_sfnt_off00006e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9B 10608 bytes
SHA-256: e7370dc86438932485d5ee96bdeecefbf629809c998ec6bd00090c42d7ef9470

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