Malicious PDF — malware analysis report

Static analysis result for SHA-256 4852c4b2d3d7fcce…

MALICIOUS

PDF

51.9 KB Created: 2020-07-31 13:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a84f3c4d61f0ab251f97dc42236a203f SHA-1: 158e05eb0e3e2fec2727bb5667de382517298be4 SHA-256: 4852c4b2d3d7fccec9e263b5c3cf8788b94a26ea3ecf485236b8a0e02107d14f
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, indicating the document's primary purpose is to lure users to malicious sites. The 'PDF_SEO_LINK_FARM' heuristic suggests a large number of outbound links, likely for SEO manipulation or to obscure the malicious destination. The ML classifier strongly supports the malicious nature of the PDF.

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=how+to+overcome+barriers+of+effective+communication+pdf In PDF document text
    • http://files.daintydivasdancewear.com/uploads/1/3/1/3/131378950/tosovob.pdfIn PDF document text
    • http://files.orderlypackrat.com/uploads/1/3/1/4/131483440/luvudu_tovireduxila_renanesebex_bemomewurija.pdfIn PDF document text
    • http://files.mrshaolebrownie.com/uploads/1/3/1/4/131437087/5294102.pdfIn PDF document text
    • http://files.wolfambassadors.com/uploads/1/3/0/7/130775806/5763b9654d.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/1/0428/9835/8432/files/ziwodukujaluladiludu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7182/3267/files/komunudiguvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93527538138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2315/5878/files/faseragawerel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7812/2649/files/vigepavokevuparedibij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0349/3026/files/39208108995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9107/4976/files/90839090275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/76350606481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4486/2114/files/63466821628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4116/9303/files/serinoxanikefepido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/65487509879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/sezalafif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1748/7011/files/bolepefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1481/5901/files/8680013280.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 6

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_off00008d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8A 5404 bytes
SHA-256: 535364222e306e494c0950929e49895fd160526b19c791968506f57312429076
font_01_sfnt_off00009fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FDC 9904 bytes
SHA-256: 8ce82f61ff2d3ce3620abc76dc316eab7fbdabdb34f2954fe13e98b2bba486dc

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