Malicious PDF — malware analysis report

Static analysis result for SHA-256 210e511b19f35812…

MALICIOUS

PDF

46.7 KB Created: 2020-08-09 05:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e07c0ca658db7ff28eaef5331a6f2ab8 SHA-1: 0c1dcea5536bd62053148fca87f3feb59d9c6fb1 SHA-256: 210e511b19f358126f5072eb57da90abee7b0465c130595814e9aa0a77df4ffc
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a legitimate download. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the embedded URL in the document body strongly indicate this. The ML classifier also flagged this PDF with high confidence. The document body text and embedded URLs suggest a lure related to medical information, specifically "neonatal jaundice pdf download", to entice users to click the malicious link.

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=neonatal+jaundice+pdf+download In PDF document text
    • http://files.mymeds.info/uploads/1/3/1/4/131407734/8959684.pdfIn PDF document text
    • http://files.parkingguidance.com.au/uploads/1/3/2/6/132695586/9689566.pdfIn PDF document text
    • http://files.breckrothage.com/uploads/1/3/2/7/132712209/vubotu.pdfIn PDF document text
    • http://kebaxom.brayofbeauty.com/uploads/1/3/1/6/131606490/datapifomisowokub.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/1/0433/4800/0922/files/15770642242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0172/4577/files/20835387056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4047/2214/files/lupiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/damegadunuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6192/7318/files/nevizobebikadefazajumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/lomozej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8772/2648/files/treasure_planet_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0982/5176/files/fiwazamewupiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4388/0103/files/kopekanepifebasaliduvaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9257/8208/files/list_of_bharat_ratna_award.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_off000079af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AF 5012 bytes
SHA-256: 9c90e5e9ba3d3101fc18ce059b4b876d0cb0a5f9693b0d984b0e931560986ec0
font_01_sfnt_off00008af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF4 10192 bytes
SHA-256: 68552039ffd43e3ac05e92dfe3ec6a23507bb03287fc4eed6ddcb39b96d9df37

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