Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b86f756722f4449…

MALICIOUS

PDF

42.3 KB Created: 2020-08-14 19:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a6bd9fb94320e22180f42b8fba91bb22 SHA-1: 3028f87e30e7d9e68431182e29bcf6bb390ce55b SHA-256: 2b86f756722f44490198498c8cd1546482f077bdabe350bdb8dbc35be87538fc
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 an assembly guide. It also hosts numerous other PDF files on various domains, suggesting a link farm or content-laundering operation. The ML classifier strongly flagged this PDF as malicious. The document body contains obfuscated text and embedded URLs, including the primary malicious redirector.

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=aow+planetfall+assembly+guide In PDF document text
    • http://files.ncstrategicperformancesystems.com/uploads/1/3/1/4/131406855/newudufazexejaweso.pdfIn PDF document text
    • http://files.3sixtyinc.com/uploads/1/3/1/0/131069875/4068672.pdfIn PDF document text
    • http://files.burrillvilledems.org/uploads/1/3/1/3/131381288/lirotibak_letelivevumak_xivexib_popixazogokuno.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/1/0433/1828/0357/files/beauty_salon_business_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0392/5912/files/cds_exam_syllabus_file_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1451/9973/files/wedunaxezamaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8963/9077/files/84628505899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7854/9665/files/27578169655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4452/7528/files/modern_periodic_table_with_full_names.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6676/9054/files/effects_of_smoking_cigarettes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8086/7235/files/adventure_island_4_gba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/51468284093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7986/8309/files/simagoded.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0329/7437/files/gopasikowox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9845/4693/files/xusawakuduxosijoboba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/mewox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/ripufegivasiwoxenumal.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 3

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_off00006672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6672 5588 bytes
SHA-256: 1f32f0d1aa7e285744f4d78139ffadc768d3cf19dd97da10e86ec4f9fdfa477a
font_01_sfnt_off00007977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7977 10176 bytes
SHA-256: a488bc44fd445629999d822cb2d8b0f04af3f944e0e6998ac31511da08a96f1c

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