Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf0d838f5a9488df…

MALICIOUS

PDF

48.3 KB Created: 2020-08-27 22:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d82a46a90f6e01b5e19ef837c946735a SHA-1: ed8365c83df269bd7b694eb8ba7095e571575d70 SHA-256: cf0d838f5a9488dfbe5866df8a3d86c7d287e78aad1e006e44148535e0d6b485
194 Risk Score

Malware Insights

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

The PDF document was flagged by a critical heuristic for linking to known malicious redirector infrastructure and also for containing a large number of external PDF links, suggesting a link farm. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the ttraff.ru redirector, which likely leads to a phishing or malware delivery site. The document body contains garbled text but also includes the malicious URL and several Shopify-hosted PDF links.

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=meralgia+paresthetica+exercises+stre In PDF document text
    • http://files.bodyrevolutiononline.com/uploads/1/3/0/7/130738859/8740811.pdfIn PDF document text
    • http://files.jhaytersmilestudio.co.uk/uploads/1/3/1/4/131437363/b14096ff9cd13.pdfIn PDF document text
    • http://files.breezypointdermatology.com/uploads/1/3/1/6/131637271/3431406.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/1/0431/4837/8280/files/89007394916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5562/0006/files/bootstrap_3_contact_form_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9645/7884/files/xesenutozin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0601/7185/files/98116323790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8877/9166/files/xunuvavutozodijenadisapuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5578033559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/zuzegelokaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/c_programming_language_algorithm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1581/3795/files/mibonufalosado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1615/7344/files/nuzilivod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/9174/6977/files/windows_10_notify_to_updates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2951/8741/files/manexofapefunirapi.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 7

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_off00007f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9C 5268 bytes
SHA-256: 700d1a39e1300fd43ab1d12e9c7a1c7dcbec4e46fc4426ada646bd6413430dbd
font_01_sfnt_off0000918a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x918A 10192 bytes
SHA-256: ec7bb4d164faf15906ed931143032bd563bf02a3cc22cf62a65bb669e0f5024e

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