Malicious PDF — malware analysis report

Static analysis result for SHA-256 63bc05dc71b62f33…

MALICIOUS

PDF

42.2 KB Created: 2020-08-09 03:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ec33ae08e0a07779b38742ab9eecceb6 SHA-1: 6b2495132a999799e03890b3031b5af367092c01 SHA-256: 63bc05dc71b62f3392f4e665cca5c4bb62c6fffb530714c6a4d661707831516d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to appear as legitimate downloads, but they redirect to malicious infrastructure. The primary redirector URL is identified as malicious, and the document body contains a mix of legitimate-looking text and the malicious URL, suggesting a phishing or scam attempt. The ML classifier 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=physics+formulas+for+class+9+pdf+download In PDF document text
    • http://files.pawsacupuncture.com/uploads/1/3/2/6/132696104/nekola_gefewukulipez.pdfIn PDF document text
    • http://files.myladieparadise.com/uploads/1/3/1/8/131872079/134f2e0240.pdfIn PDF document text
    • http://zalimura.dnofsinger.com/uploads/1/3/0/7/130776407/d338d05cfb12fb2.pdfIn PDF document text
    • http://files.oaa90.com/uploads/1/3/2/6/132695629/lomuresiru_binutanomanaz_jidinonakeneles_namavetizano.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/1/0434/3509/8264/files/wobudipuwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7175/0823/files/823329248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8044/1238/files/pressure_switch_calibration_procedure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2097/4242/files/longest_common_substring.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/wivimogofuxagid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wizivudid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7098/8196/files/71335632323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8999/1582/files/11329332339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62386903812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1564/3042/files/mixed_perfect_tenses_exercises_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3412/3160/files/nozagin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9870/1977/files/98726980669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.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_off00006557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6557 5744 bytes
SHA-256: 48ae71c0bf88c7bac02b4049bbaae2616d3c908d3e5895b68c9460f5bba354b6
font_01_sfnt_off000078d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D4 10248 bytes
SHA-256: 66eb00da2a28b8e0f812a0381bb2f56f2e4d9f5470379f584c2103773452f716

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