Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1a40f2657aadf1c…

MALICIOUS

PDF

42.1 KB Created: 2020-08-12 08:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a6732fb8a8a4e875970dfe298080d8cb SHA-1: 465993bc73f1455638c54a8872a1f380e0cc2b2b SHA-256: c1a40f2657aadf1c33232844c6d2f123b8ad99fff25952b47859ca3cfc16a078
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to domains associated with SEO link farms, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector, suggesting a lure to a phishing or malware distribution site. No scripts were extracted from this sample.

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/wb?keyword=scale%20drawings%207th%20grade%20worksheet%20pdf In PDF document text
    • http://files.matthewpeckhamtenor.com/uploads/1/3/1/4/131483371/muver_jilimunerumuvil_gelowebipudaz_doroviz.pdfIn PDF document text
    • http://files.artofandrewchesworth.com/uploads/1/3/1/4/131483491/danudonojidas_bopovikefukir.pdfIn PDF document text
    • http://files.willhumegames.co.uk/uploads/1/3/0/8/130814682/6a313e980e85.pdfIn PDF document text
    • http://files.afd-pdx.org/uploads/1/3/1/3/131397960/tigemoduxejufaxo.pdfIn PDF document text
    • http://files.mknhp.org/uploads/1/3/1/6/131606011/varematokelubaxa.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/1/0431/7026/7291/files/xapunozazogirezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/69264192518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/white_album_anime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1204/6495/files/deuterocanonical_apocrypha.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1595/4847/files/fipeligimotituvuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4301/0198/files/joint_distribution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2104/0789/files/insurgency_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7652/5988/files/terokusarujetenaxejalev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/gikumakixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2285/9944/files/wujuwikizudukitewejapoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1610/1798/files/sezifafurakemilebefim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/visisef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7276/6631/files/ncert_biology_class_12_in_gujarati.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_off0000650c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650C 5756 bytes
SHA-256: 085faa1cecfd9e7f50f43b70a69b8e509ad3213f98e90d72b66126759c3e820e
font_01_sfnt_off000078ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78AD 9980 bytes
SHA-256: d37245a27bfc9c82be9c495c3a7f8fb18a808fc0a45ed19b8bdfeba6ede27e86

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