Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c9562f6a830f237…

MALICIOUS

PDF

43.7 KB Created: 2020-08-04 04:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 96caf251a46ad0409c3c0118c54c14b4 SHA-1: 414c2979948215e4a192651663005998d91c091e SHA-256: 4c9562f6a830f2374ee0d1df4c6c3af684067c05c314e691a6ef9f0c280be115
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 large number of external PDF links, suggesting a link farm for SEO manipulation. The embedded URL points to a redirector, which is a common technique for distributing malware or phishing content. The ML classifier also strongly indicated maliciousness.

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=bengali+baby+names+with+meaning+pdf In PDF document text
    • http://files.andrologyamerica.org/uploads/1/3/1/0/131069869/kaziwokes_juzava.pdfIn PDF document text
    • http://files.rickloper.com/uploads/1/3/1/3/131383283/rusopejubiveruk.pdfIn PDF document text
    • http://files.mayramloeberstudio.com/uploads/1/3/1/4/131452778/7c2c5b1328b9.pdfIn PDF document text
    • http://files.miltonwildcatfootball.com/uploads/1/3/1/4/131438639/buzosaloxakak-vesalamawopif.pdfIn PDF document text
    • http://files.kalonstudio.com/uploads/1/3/0/8/130814195/e32324f.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/1/0430/4489/6917/files/fijusoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kufotiniponekurek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8360/3873/files/18251152735.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/zuvanaboki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/voseset.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4764/1510/files/76654841718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/50514286529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9940/5979/files/zogevurijobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6204/2529/files/lagovebijofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/norazedaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/77694493224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/zivasadosakeredabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/20475696767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/zitimafiwezelekajes.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_off00006c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4C 5744 bytes
SHA-256: 1c2a3845508ba0c93f3b75f09137058740ab287fb424722d632e68c5e39d53f4
font_01_sfnt_off00007fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCA 9836 bytes
SHA-256: e8d567fa71d27eb6a6fa4547f2a156ae841abff47ed049bd4ade6726f2f85132

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