Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf08a8bd41acecc6…

MALICIOUS

PDF

39.5 KB Created: 2020-08-12 18:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7a7a3e78cc5fdc6d1e2aeed48747dffa SHA-1: 0c1c237aa6bd49978271dc56bb2cab02d086baf3 SHA-256: bf08a8bd41acecc6f8b48105041d51f7d50147ab9c81cbfc474042b4b897791e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, with the heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicating that at least one points to known malicious infrastructure. The 'PDF_SEO_LINK_FARM' heuristic further suggests a large number of external links, likely to manipulate search engine rankings or to host malicious content. The primary malicious IOC is the redirector URL. No scripts were extracted, limiting the ability to determine further payload delivery or execution methods.

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/wb?keyword=themes%20in%20information%20system%20development%20pdf In PDF document text
    • http://wasugog.sakivintagekimono.com/uploads/1/3/1/4/131437363/pazurasofi_nopiwixofefavi.pdfIn PDF document text
    • http://files.radarstrongjones.com/uploads/1/3/2/6/132681080/972861.pdfIn PDF document text
    • http://files.alpost119.org/uploads/1/3/2/7/132740399/a6dba498.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/1/0441/2263/6440/files/linkin_park_numb._mp3_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5523/2677/files/catalogo_andrea_primavera_verano_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/1748/2919/files/nsw_school_calendar_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/veridepepigibafukefuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0654/9406/files/93513769597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/bowivazinef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0051/1138/files/3213345251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9967/5041/files/signs_and_symptoms_of_schistosomiasis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9136/5792/files/network_marketing_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/19593497464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1371/7662/files/kurosuxovotizirutis.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 5

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_off00005ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE2 5392 bytes
SHA-256: 8141a2708dbb5496c41c956330eb8d3fb7e8b2bbbe4f72124d5bd60da293a99b
font_01_sfnt_off00006f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1F 9928 bytes
SHA-256: 96758662b245eba6c65707f5259bfbce3af3b618e1d8d9a26bd03ebd591f39ae

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