Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0ea9f71966521a…

MALICIOUS

PDF

52.1 KB Created: 2020-08-04 23:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e16b2d5a09054a782845ca0ee2d90f67 SHA-1: 0e0de54674e4103760c66827be637571b5832450 SHA-256: bb0ea9f71966521a1f24d939b585f24c0cad9e5de04ae526df9c6a6b5b9f3354
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL points to a redirector service that uses keywords related to downloading forms, suggesting a phishing or scam lure. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the same malicious URL.

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=blank+biodata+form+pdf+download In PDF document text
    • http://files.pittsburghcatchwrestling.com/uploads/1/3/0/9/130969160/xozigitojiwukob.pdfIn PDF document text
    • http://files.southwickchurch.com/uploads/1/3/1/4/131408245/nubiluwigukelap_balikado_damuzuwu.pdfIn PDF document text
    • http://files.granbytroop125.org/uploads/1/3/1/3/131398574/4de25464dcd.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/1/0428/5313/8591/files/bulefazivefitawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/modern_physics_randy_harris_solutions_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5004/8420/files/kexosakapejelomitixase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3494/3388/files/94512527458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/netimipiguvug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5382/6726/files/83376218220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1819/6891/files/83985556905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6835/8807/files/97767951896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bizisumexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/1651688779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7333/0593/files/pifasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3513/1046/files/nuwevimedatuzizeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6175/4518/files/sadabon.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 3

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_off0000840b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x840B 5356 bytes
SHA-256: 39fe4779719320dc8df8894eff9ecec16ce7f468a26d0fd8601fc8b9ca12002a
font_01_sfnt_off0000963e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x963E 13812 bytes
SHA-256: 0a9ab016765a9325a890b30dae7da604353a17a23208a10a969502efb466e7d2

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