Malicious PDF — malware analysis report

Static analysis result for SHA-256 18070fff70e27aab…

MALICIOUS

PDF

39.3 KB Created: 2020-08-23 10:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 59e6177cc17e343b5188129fd1cb7404 SHA-1: 25e56acc4379d2492a8b082f94d167d8bddfff5d SHA-256: 18070fff70e27aab4e4a96cbda5c0d286718dcdac8fb5112632a9478cc6b9014
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, also contains URLs that appear to be part of an SEO link farm designed to trick users into downloading files. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is part of a phishing or scam campaign.

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=ecological+economics+book+pdf In PDF document text
    • http://roser.insightcounsellingtoronto.com/uploads/1/3/1/4/131414661/boregetunajilulod.pdfIn PDF document text
    • http://files.customdvs.com/uploads/1/3/0/8/130874485/xeduverefidake.pdfIn PDF document text
    • http://files.thebeaverindustries.com/uploads/1/3/2/7/132740814/xoxarizexamad.pdfIn PDF document text
    • http://nulawa.workbyronjohnson.com/uploads/1/3/2/6/132696414/3227551.pdfIn PDF document text
    • http://files.gpvaniermusic.com/uploads/1/3/1/0/131070317/doletube.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/1/0430/0704/9877/files/boosting_self_esteem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6659/7269/files/apush_period_2_key_concepts_review_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7702/5446/files/98630926285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/asciidoctor-_toc_macro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/5288/7190/files/ncert_class_11_biology_anatomy_of_flowering_plants.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8151/2613/files/ashirwad_mantra_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/54361902819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9472/1187/files/75957293005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/dawoodi_bohra_topi_design.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 5

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_off00005c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5A 5540 bytes
SHA-256: adc7e64f24ca9a04c8e3c2032d399352a0e2e8b91f66dfae43078e2a3a2da967
font_01_sfnt_off00006f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1E 9772 bytes
SHA-256: 9a28ff3b442f68a5179a23bd5cb63243a27b91afb815152eb93284c4da2c1233

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