Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ad375e2fb5ae7c…

MALICIOUS

PDF

38.0 KB Created: 2020-08-15 01:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3f6b80630cefe5436c66594934692d99 SHA-1: bf64b8eea5350606e0635f26c6ef95b380c76510 SHA-256: 93ad375e2fb5ae7c8635e4b4fdd9fe7963dfae573d11a185944a2ca9f3c8c9a6
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, appears to contain the same URL and references a 'contractions worksheet 4th grade pdf', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, likely to improve search engine ranking and disguise malicious intent. No scripts were extracted from this sample.

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=contractions+worksheet+4th+grade+pdf In PDF document text
    • http://files.frankgolden7.com/uploads/1/3/1/4/131453588/c13ea66cc45dbad.pdfIn PDF document text
    • http://files.uncoveryourancestors.org/uploads/1/3/1/1/131164117/4126455.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/1/0431/2625/9876/files/60011070567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0065/9100/files/template_powerpoint_2016_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4384/7328/files/95500468800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3480/2333/files/absolute_power_novel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3395/1399/files/hayward_tiger_shark.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/jexuremu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3264/0679/files/95423058387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/tupirosagunopiwedelerora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7131/5876/files/tikodenidodixevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1335/6189/files/21951531858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6481/8838/files/beechcraft_c23_sundowner_performance.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_off00005685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5685 5532 bytes
SHA-256: 3120960e213fe01551586e3a9108a4db1364d12eadb09741f720c94e5d3bf9e6
font_01_sfnt_off00006965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6965 10100 bytes
SHA-256: a08edacbfd024c99bf0ac8fd7027e42c9ed8c5c820b353bf07d344f05335554e

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