Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c0f02aa67761c0…

MALICIOUS

PDF

39.0 KB Created: 2020-09-11 12:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 045f844e1e3654658500d654bb1bc3dd SHA-1: 33c86b560e8216d216f05dc68b8b5d46145e45d8 SHA-256: 78c0f02aa67761c0052347c51a976f31b1e07fa9c5030beb3218db66fbec488b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to a redirector infrastructure identified as malicious. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, indicating a deliberate attempt to lead users to external content. The ML classifier strongly supports the malicious verdict.

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.cc/wb?keyword=manual%20of%20veterinary%20echocardiography.pdf In PDF document text
    • http://files.tesslockhart.com/uploads/1/3/1/6/131608037/fokegipafowa.pdfIn PDF document text
    • http://files.domaplasma.com/uploads/1/3/1/1/131164534/gifuwubumip.pdfIn PDF document text
    • http://files.kiettaicao.com/uploads/1/3/1/1/131164524/pifitefub.pdfIn PDF document text
    • http://sotelid.nikkicshairstudio.com/uploads/1/3/0/7/130739069/jalixagomunejunugob.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/1/0431/3969/4741/files/murmur_of_the_heart_full.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8204/5858/files/swiggy_for_windows.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7671/3637/files/product_business_plan_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9469/5318/files/muvuvizujiranozilexenowog.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a298ce_90ded67b1ed44c4aa246b4496bf86407.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1acd69_54ee2b22b2e24d119b5487dc2e6d0c46.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c4f63d_394392ec97284772b7ab7244f1a7a873.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/353d00_15798decbf2e491ca89a607cace66bfb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/74c34a_38be9bef7ba244a0b0c3a8e2c7b4d382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4765/6343/files/moderibuwotujorigetigiror.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3304/8741/files/fixed_left_sidebar_css_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/bradenton_police_department_crash_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8212/8291/files/nusapus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7576/3353/files/horizontal_scroll_view_in_xamarin_forms.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_off000059f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59F2 5440 bytes
SHA-256: 6b40be2a5c57c2768249d2fe56cac3c74d8af3c3465aabd2217839e70fb5cb07
font_01_sfnt_off00006c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C92 10332 bytes
SHA-256: e7f537687bc803122833c9fce9465b5cb2b3672d24d509f78a47d9d8daee94e3

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