Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b3cb0a1adf509c4…

MALICIOUS

PDF

40.8 KB Created: 2020-08-15 03:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 865d543848a3a774fa6f9c198adf8e41 SHA-1: 8039fc5b91c6e71c8d4ea9f2ebd32efe818c3685 SHA-256: 0b3cb0a1adf509c4014650d636325fcb2f49027b0d169cd9b2a7c4213654fd4b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM. The primary redirector URL, https://ttraff.cc/wb?keyword=generos%20discursivos%20tipos%20pdf, is identified as malicious. The document body, though heavily obfuscated, contains this same URL, suggesting a phishing or scam attempt disguised as a document download.

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.cc/wb?keyword=generos%20discursivos%20tipos%20pdf In PDF document text
    • http://files.dealingwithstuff.com/uploads/1/3/1/8/131856270/ramosik.pdfIn PDF document text
    • http://turete.bradrussellmusic.org/uploads/1/3/2/6/132696483/mixus-sonubewux-zimowonewifuja.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0434/3794/9090/files/88947147538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2280/9250/files/33775861233.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3160/0031/files/pirated_games_for_ps3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/waxodukilazoriledan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6965/1609/files/65907533628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1777/8838/files/woxubodovisenux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5011/3943/files/38585861725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/relevukaxubatubajuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2848/0154/files/muzzle_flash_video_effect.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3125/7510/files/38748296333.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58C1 1684 bytes
SHA-256: a8640cb23b15ac802f89dd0648c07b7ad030d8b62c5f78624c3814794ace58c4
font_01_sfnt_off00006125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6125 4996 bytes
SHA-256: 2315a4453296447cfec7a373ab98dc5518eaef125ff517f95401937527f49e60
font_02_sfnt_off0000723c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723C 10648 bytes
SHA-256: 1fdd38300ea639964a96b527925f2fb1f5e2e61e9f967ef7b01416399091a0a3

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