Malicious PDF — malware analysis report

Static analysis result for SHA-256 c706bfc439efcf73…

MALICIOUS

PDF

41.0 KB Created: 2020-08-08 06:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5d271f02088c72307c381c772f7fac31 SHA-1: e10b06b7289b29bd28fa355eec5d818d329e98d0 SHA-256: c706bfc439efcf7391077eb77d859753869568f6fd36dd9eb9ab911f45be568c
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a document title ('Bmjv vorsorgevollmacht pdf') and references the wkhtmltopdf tool, suggesting a potential lure. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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=bmjv+vorsorgevollmacht+pdf In PDF document text
    • http://files.girlsincjax.org/uploads/1/3/0/7/130739678/bovosa.pdfIn PDF document text
    • http://disofa.sandriver.org/uploads/1/3/0/7/130775350/kapobotemana.pdfIn PDF document text
    • http://files.hawaiiislandgoatdairy.com/uploads/1/3/2/6/132695493/pojaz-fomipajo-raxoxanuk.pdfIn PDF document text
    • http://files.jasonkinneyband.com/uploads/1/3/0/7/130739459/2785351.pdfIn PDF document text
    • http://files.riverfrontplaza.net/uploads/1/3/0/7/130739275/6010837.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/1/0431/6237/0210/files/aparatos_del_cuerpo_humano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/komezozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4023/3879/files/kaganapan_ng_pandiwa_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/bapetilowopuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/lenabimiviwimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/13209280164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/64342786826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/wafarazasijositavenejosig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/3187401327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6987/3054/files/business_proposal_sample_powerpoint_presentation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2745/5382/files/4176181495.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
🗂 Part of campaign: sandriver.org 3 samples

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_off00005e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E16 5752 bytes
SHA-256: 70e7a4351627defda7305ea77ed3be3e340b6a54f756db5b816c39c491a2daf6
font_01_sfnt_off0000718e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x718E 11024 bytes
SHA-256: 8443d1f470ec9f757455c868348b68daed07fc2a4843af85f50541c47e0317fe

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