Malicious PDF — malware analysis report

Static analysis result for SHA-256 73fa732a3c785cc8…

MALICIOUS

PDF

37.0 KB Created: 2020-08-01 21:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bc0d27e521bfd8cd6f9aaa6c955ca27f SHA-1: 61bc8a076fdd320d3775cfa2902850615adf80a7 SHA-256: 73fa732a3c785cc808d660076fc764141cc7a04c47a8714e7c2a31fd297858d4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a redirector identified as malicious. The presence of a large number of PDF links suggests an attempt to create a link farm or distribute malicious 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.cc/pify?keyword=castle+amber+pdf In PDF document text
    • http://files.carpentercprsolutions.com/uploads/1/3/2/7/132740285/af4dab19.pdfIn PDF document text
    • http://files.maryse-alen-vedicart.com/uploads/1/3/1/4/131482946/a727cd.pdfIn PDF document text
    • http://files.hlhas.com/uploads/1/3/1/4/131483550/wuvoxipepuzan.pdfIn PDF document text
    • http://files.westcoastcreativespirits.ca/uploads/1/3/0/7/130739776/pusevisob-jomemawekinoxi.pdfIn PDF document text
    • http://files.pleasantgreenmethodist.org/uploads/1/3/1/4/131452958/punifubegujezanikira.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/1/0434/1412/6759/files/sixunixapebadejale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7536/1178/files/munekapatebirafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4501/9045/files/dojijadolibudovisalovaxej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9445/0082/files/tifadodedotajiwumexogewak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2737/2955/files/68352292586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1959/2099/files/latesumogowepisuwakib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6726/8517/files/24856707301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7318/3637/files/gatozevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/rimebipenadaturitaf.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_off000052b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52B1 5232 bytes
SHA-256: d3a60c8126ddb0ac9c1e5dae1e2ff8539ed59b5671a0f1dbfd04ee77347fec06
font_01_sfnt_off00006455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6455 10296 bytes
SHA-256: 1236a4205f7022cb6111a21abcfd3002c793ba7f115f3e483584fcd0a7f6e536

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