Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36c5b8950f592be…

MALICIOUS

PDF

34.6 KB Created: 2020-08-13 22:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 265dc6e508ae094cb27f6ce4e4e1396b SHA-1: 675417e086f77471a72b0d70f768a5fa6b6c93ae SHA-256: a36c5b8950f592be39c2bd4dfd515d723ce121086f05c4609c21074e8fab3bfe
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to a 'Baring frontier markets fund factsheet' and includes the malicious URL. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a larger link farm designed to attract traffic. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=baring+frontier+markets+fund+factsheet In PDF document text
    • http://files.thinkgroupindia.com/uploads/1/3/0/7/130776578/4434016.pdfIn PDF document text
    • http://wiwemaz.hardinsburgbc.org/uploads/1/3/0/7/130776760/1311845.pdfIn PDF document text
    • http://files.5puntocero.net/uploads/1/3/2/3/132303270/zerolasipo.pdfIn PDF document text
    • http://ropul.clearpointtechdesign.com/uploads/1/3/1/8/131871433/kimuvigazuber_guxupaseturot_sirozereteb_gegasil.pdfIn PDF document text
    • http://files.purbecknewwave.co.uk/uploads/1/3/1/4/131437812/mufusajutujemavime.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/1/0432/6899/7286/files/autocad_commands_list_with_explanation_in_urdu_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7526/3898/files/62958335390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0627/9332/files/12426326405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0539/3571/files/76694247580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7270/1095/files/10th_class_math_notes_science_group_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2302/2752/files/c_objective_type_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/8277/9541/files/web_design_crash_course.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/30647065563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6763/5867/files/28771264347.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 4

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_off00004807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4807 5516 bytes
SHA-256: a4a9ec61c581cbb3db3249de1117acc59344fc72026ee64e0e447780937ff1d2
font_01_sfnt_off00005aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA2 10300 bytes
SHA-256: 4653ded413f845d6be9e582e967d965ef56c3af815875c5bec14e9935e96ae67

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