Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b85595b4cff9047…

MALICIOUS

PDF

39.2 KB Created: 2020-08-08 01:37:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b099aa99b7bc973954969a5a95776f17 SHA-1: d9b551c626652761559abaace06e66c30cd2df6a SHA-256: 6b85595b4cff904700a05b39df9947ceb6a906500e6561b4e6e14c8cac93c559
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'telling the time worksheets' and includes the malicious URL, suggesting a lure for users to download potentially harmful content. The ML classifier strongly indicates maliciousness.

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=telling%20the%20time%20worksheets%20for%206%20year%20olds In PDF document text
    • http://files.drugaffectedchildren.com/uploads/1/3/1/0/131070204/5703115.pdfIn PDF document text
    • http://semupu.alexandramcintoshlaw.com/uploads/1/3/2/6/132682646/jopuzodat.pdfIn PDF document text
    • http://files.antoniatsaknaki.com/uploads/1/3/1/4/131482886/mazinu.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/1/0428/4999/2870/files/bertrice_small_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/dadilovifajanalenosopil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6105/9477/files/38615660973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/92210512865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7281/3211/files/vozawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/kidofunuwukokelufovun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7228/9944/files/92077592994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6667/1782/files/dofilisidoruwedakojide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/86018826657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/fijikuloluzavegewagumad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52135332303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/rakaxogexewonuvuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/1388231036.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 2

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_off00005aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AEA 5680 bytes
SHA-256: 71ea19cab930afe3b141f29f15b7dc592650112ebe9f3a66c6508579f2392192
font_01_sfnt_off00006e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E29 9872 bytes
SHA-256: 4b25c11c49de7eee7e2b5638ca7c00d378d00274c00557d0b83b6ec097f9f2b7

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