Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3cd86557ae7f6fe…

MALICIOUS

PDF

47.6 KB Created: 2020-08-03 09:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7d5eca8c28d32f24c2d2fdd411a6338e SHA-1: 3e883977549fea45dbe7c846cfb2d4021d35861b SHA-256: a3cd86557ae7f6febbeaf89f5fbf661c98e43cfe5351de1b8f7eda0a7a15fcfd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used for SEO link farms or to redirect users to malicious sites. The primary redirector link, https://ttraff.com/pify?keyword=es+capate+luis+coronel, is flagged as malicious. The document body contains obfuscated text and embedded URLs, further supporting the malicious intent. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=es+capate+luis+coronel In PDF document text
    • http://files.marriage.as4u.us/uploads/1/3/1/3/131379296/poradaneluba.pdfIn PDF document text
    • http://files.navdeepgill.com/uploads/1/3/1/4/131409755/1694487.pdfIn PDF document text
    • http://files.littlegreenjeep.com/uploads/1/3/1/6/131607683/jotuwugowar.pdfIn PDF document text
    • http://sedeto.williamsranchdoodles.com/uploads/1/3/2/8/132815002/xejafefafuxut-nutugazodapi.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/1/0428/4488/1059/files/rozidopidomopoxudafazino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/kuginurefepevebuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8960/8360/files/livixexatufefefogufelosej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kumug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6499/0632/files/xovoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0326/3645/files/51094859682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1958/3133/files/ropusabazok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/10704516579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/55864873889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5881/3341/files/92996193120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1466/7936/files/93130196929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/81056524542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4158/6332/files/1059882409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4748/3552/files/76356939711.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_off00007a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A23 4884 bytes
SHA-256: 6a0ad07c887c2cfc63fe1a9ee6e79c2bfaa9eef416fa0c4c0fadc32152791ec1
font_01_sfnt_off00008ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD3 11372 bytes
SHA-256: f907df8aec9458ac475dd909651f7f2adf3af8378337ba28ce6c3ed69e1883cb

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