Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f4830c5388471ec…

MALICIOUS

PDF

40.6 KB Created: 2020-08-21 02:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b5c2ab4407fe5abff06e05a8a49be37f SHA-1: f50a8a6b9ee12f346286d5c6626a97ae19fade11 SHA-256: 6f4830c5388471ec890cc34d7c6c5cca960c900422be4974f5f32e0a48ee678c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.com), suggesting a link farm or phishing campaign. The ML classifier strongly indicates maliciousness. The primary malicious IOC is the redirector URL, which likely leads to a malicious payload or phishing page.

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.com/pify?keyword=bratstvo+crnog+bode%25C5%25BEa+16+pdf In PDF document text
    • http://files.envivantblog.com/uploads/1/3/0/7/130740190/db1beb2b78f.pdfIn PDF document text
    • http://suwexef.tonodiaz.com/uploads/1/3/0/7/130776407/6782670.pdfIn PDF document text
    • http://lijobowub.newdrofscifi.com/uploads/1/3/1/3/131384403/fonuriwefubarozado.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/1/0428/6434/5255/files/25734479566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/mathematics_in_the_modern_world_philippines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0087/8488/files/verizon_canceling_contract.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0797/5317/files/gafugasapuseto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4686/8891/files/angular_5_date_format_locale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8921/5893/files/solidworks_student_license.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3236/0613/files/77286121607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7955/7535/files/lanavir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/16893118726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/60772537754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/pulojo.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 1

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_off00005ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE6 5824 bytes
SHA-256: 3dbc8c701ccdef8ad1af11876cfd5c3da80795e81439d2f925e7b409af3055d1
font_01_sfnt_off000070d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D8 10240 bytes
SHA-256: c1c8eeaa289fbd5664c856a8b1d8a525a790f625d1b6b49ba09e752327f0ad3d

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