Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f9938f6b3854162…

MALICIOUS

PDF

47.1 KB Created: 2020-08-03 05:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bfaeb748fdf4dce88b32d7b6d513b949 SHA-1: 31dcfbdb06b1e6943ff3714bdbb0c951a0808fcb SHA-256: 8f9938f6b38541622936b29bebdc7d666bed9bf866a5b97939f1a8bcc5062344
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a link to basketball training material. The document body, though heavily obfuscated, contains the same URL. The presence of a link farm heuristic suggests an attempt to manipulate search engine results to distribute malicious PDFs. 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=basketball+workouts+for+guards+pdf In PDF document text
    • http://files.daisyclaridge.com/uploads/1/3/1/1/131164295/kurisuve-wemipisif.pdfIn PDF document text
    • http://files.northerntracker.ca/uploads/1/3/1/4/131452836/wazanezubowuzi-daritase.pdfIn PDF document text
    • http://files.baptistelakecampingandstorage.com/uploads/1/3/1/4/131483184/2d985a1add1c.pdfIn PDF document text
    • http://files.panteras.info/uploads/1/3/2/7/132712315/1da0872.pdfIn PDF document text
    • http://files.spinecarechiropractic.net/uploads/1/3/1/3/131384018/30437.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/1/0434/9417/8982/files/68517333860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2577/4245/files/46520408025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1420/7134/files/59890771373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2171/4079/files/gezugawukuret.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5624/2589/files/bedugadikokikerilogejipim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/76384726588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/86084321017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0595/8565/files/appositive_phrase_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/8_form_tai_chi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/fortune_enchantment_minecraft.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 8

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_off000079d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D9 5552 bytes
SHA-256: fc5e10ca53c4251d46699555b4e373fcb56e1ac916fd75672b7323eb63ef7eb5
font_01_sfnt_off00008ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE1 10064 bytes
SHA-256: 6a3c12f21d8767ba85a59db1e33d6d76581886182a1b290e93bbead9a9d01127

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