Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f3a215537645252…

MALICIOUS

PDF

49.7 KB Created: 2020-08-06 18:18:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3574f76c527dc64e25076584c6a1aa26 SHA-1: 8aca474d6ea2767b2f92f6a66362052e0e945fa7 SHA-256: 8f3a2155376452528b0b2398d92ba44d6b9207e631ee9ff70b6e20334e2a464c
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be SEO poisoning or a link farm designed to redirect users to malicious content, leveraging the 'ttraff.ru' 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.ru/pify?keyword=ansi+b16.+5+standard+pdf In PDF document text
    • http://files.thornhillschool.org/uploads/1/3/1/3/131382583/vavuwila.pdfIn PDF document text
    • http://files.hvswug.org/uploads/1/3/2/3/132302787/wutudavepowuvosiwiw.pdfIn PDF document text
    • http://files.skybluemusic.org/uploads/1/3/0/9/130969993/6da35.pdfIn PDF document text
    • http://files.gettingtogethernow.com/uploads/1/3/2/6/132695294/notivabixe-mixetujim-gepijavam-zewerufenuro.pdfIn PDF document text
    • http://files.breakthroughlocal.com/uploads/1/3/0/8/130814513/4986932.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/1/0432/8321/8588/files/green_belt_certification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7918/8118/files/sazapap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/discord_mute_user.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/wagowilomofipititakiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/fakunoludil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3384/5150/files/32208228743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7274/1791/files/filebedajonazazemozeda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/convert_to_audio_file_free_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8165/3655/files/wominepowokixilit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/discord_bot_js.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1161/8462/files/how_to_disable_mouse_acceleration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/discharge_against_medical_advice_form.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_off00008542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8542 5492 bytes
SHA-256: c0d113b36506194ea3e41b28815084f7d560b6cc0d7ccb44133ca478b126b048
font_01_sfnt_off0000980b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x980B 10012 bytes
SHA-256: 24b7afb3b4c1430aedf33ea7da48c3ab11ab0eaa7e77e8baf281ea23d3905322

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