Malicious PDF — malware analysis report

Static analysis result for SHA-256 86ae24b1d0cfe213…

MALICIOUS

PDF

55.4 KB Created: 2020-08-23 19:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7def59e7299e79d44243718503e2b295 SHA-1: 2151d4d0d8c84d504d23920d868aba32a6edcb6f SHA-256: 86ae24b1d0cfe213e57a3098dfe0c42682a1e770b0e6566962fad60368de713b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, including one pointing to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=cbrn+course+full+form'. This redirector is part of an SEO link farm, suggesting a phishing or scam attempt to lure users to malicious content. The ML classifier also strongly indicated maliciousness.

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=cbrn+course+full+form In PDF document text
    • http://files.schoolpatio.com/uploads/1/3/1/4/131407921/laturobepala.pdfIn PDF document text
    • http://palute.gulgongeisteddfod.com/uploads/1/3/1/4/131406344/1973789.pdfIn PDF document text
    • http://files.toronto4life.ca/uploads/1/3/2/6/132683289/597475.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/1/0428/9835/8432/files/64989875230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/9402/1030/files/accounting_dictionary_english_to_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9252/3675/files/attitude_magazine_june_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4718/2759/files/63019242075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/atlas_de_microbiologia_koneman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2988/3048/files/cryogenic_engine_ppt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/72450459932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1116/0738/files/calvert_county_sheriff_accident_reports.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/berta_v_c3_a1zquez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/17575499999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0392/8991/files/cset_math_subtest_1_study_guide.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_off00009c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C4A 4864 bytes
SHA-256: c4b533d0d132c37fde8110abf660d1e41be4c640b39e7a8e68bb5fa0b92317e8
font_01_sfnt_off0000acb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACB8 10644 bytes
SHA-256: f8a618c5ee9c087512223061b31e9d9821466bc2b173c755cc9f751c0785d493

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