Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9ed3e711981f400…

MALICIOUS

PDF

42.2 KB Created: 2020-08-14 21:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 599ca5c4586dcfe8b3356ef2426b87e5 SHA-1: ae12a028d1b05bc74ba78a1bb3d57a6090b203f2 SHA-256: a9ed3e711981f400ac712489faadd5f544bd111dd56f6d127bf282a061a33ecb
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct link to malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests a large number of links, likely for SEO manipulation or to host further malicious content. The document body itself is heavily obfuscated but contains URLs that align with the link farm activity.

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=cecilia+bartoli+vivaldi+album In PDF document text
    • http://files.theyeyechampionshipleagues.com/uploads/1/3/0/7/130738700/kurakuka_ruwurulawu_viratuwuxir.pdfIn PDF document text
    • http://files.wild-woodbury.org/uploads/1/3/1/8/131860645/natisi.pdfIn PDF document text
    • http://tabutux.ostervillegardenclub.org/uploads/1/3/1/3/131380005/3607751.pdfIn PDF document text
    • http://files.mytravel.guide/uploads/1/3/1/8/131856991/dinexalabaro.pdfIn PDF document text
    • http://files.thyroidlabguide.com/uploads/1/3/2/6/132695543/b1db8a03cd6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8094/1729/files/kobatujinunaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6244/2661/files/jitozejamavawat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6662/9032/files/bilge_adamn_korkusu_oku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/dubupoxorifibaxevenolup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2499/7800/files/venudugewij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72593533024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0633/4888/files/38915700265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6533/5208/files/69839684994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/70121498427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4204/4066/files/44698060378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/64251493324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3107/2666/files/ayat_ruqyah_syar_iyyah.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A84 4908 bytes
SHA-256: 214999f4eefab2eb9f990f158fc64f69c01971686dfafc1c74b738f1fa04f10a
font_01_sfnt_off00006b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B34 10068 bytes
SHA-256: 8b1e0e9f3b37689a683d1b2c8f0bf0e2619fb4b0e10f2a1fa89d5fee0592a1b3
font_02_sfnt_off00008da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA9 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71