Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd0ce16027e4996…

MALICIOUS

PDF

42.3 KB Created: 2020-08-15 11:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6aed6ff2084b6550d820a17b3e5fb246 SHA-1: e0ea2d0cafa43c2e04ea13964003549a2227f4da SHA-256: cbd0ce16027e499666b57c35c1b9d752bdaa5a1658fbb947e6b86a90b01e3aba
194 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'dna replication steps worksheet' and the malicious URL, suggesting a lure to trick users into clicking the link. The primary malicious URL is https://ttraff.com/wb?keyword=dna%20replication%20steps%20worksheet, which likely leads to further malicious content.

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/wb?keyword=dna%20replication%20steps%20worksheet In PDF document text
    • http://files.klinikjubilee.com/uploads/1/3/0/7/130739918/6b706eb.pdfIn PDF document text
    • http://jakegid.socialmissionmetrics.gwhwi.org/uploads/1/3/0/8/130814328/zubuzudofojupif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/26087694497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/kewinedisivimatezaleno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/32378599802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4135/6950/files/wuvasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7427/2924/files/28049872406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wogol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4952/5149/files/59109586208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4233/3087/files/pafek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/58493832496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6638/2746/files/86627203737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5083/5876/files/24119542996.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 4

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_off0000596d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x596D 4964 bytes
SHA-256: acddd5f07cf986fd040766940316c54549c778505820a4cb8b1cacbb5f1131b1
font_01_sfnt_off00006a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4C 10124 bytes
SHA-256: b978980ff0d970c38651636b51330c3fbd67e6363af8c318f5660d20d4cb16dc
font_02_sfnt_off00008ced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CED 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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