Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c5ca5952dd11ff…

MALICIOUS

PDF

54.2 KB Created: 2020-08-02 17:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00a4e8e55c67e99c1bdab078e60b5c13 SHA-1: 20ec88d7fc4bce166271c7fea7eae157bef52cba SHA-256: c1c5ca5952dd11ff2d5a9ded7c4f355b4e71aa531755cf555390bc2ae26af4de
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a large number of embedded links, many of which point to external PDFs. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body contains a URL that appears to be part of this link farm. The primary intent appears to be SEO manipulation or redirection to malicious sites.

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=banjo+kazooie+minecraft+skin In PDF document text
    • http://files.jonmorris.net/uploads/1/3/1/3/131398085/jalokesavituru_diwedum_lamaxumipa.pdfIn PDF document text
    • http://files.snowypeaksoap.com/uploads/1/3/2/3/132302973/a7512c13cdce8e.pdfIn PDF document text
    • http://files.growingforwardnow.com/uploads/1/3/1/3/131383398/fd619d27b1dc333.pdfIn PDF document text
    • http://files.indianhockeyskills.com/uploads/1/3/0/8/130814717/7919cf.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/1/0436/3013/3406/files/famoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/42663992473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4154/4600/files/77620323570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/5574638217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1265/2194/files/89473341316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/neduxobilarejatubitunug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4056/9501/files/novaronavakir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/82751205460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/segogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8514/3969/files/sojekolapilafepepareseg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/37975474321.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_off000096cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96CF 5232 bytes
SHA-256: f8a00fb0fa92bd53a07dce8dec2806c96ceeee65e674dd6b1ec1b592b4504661
font_01_sfnt_off0000a89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA89B 10392 bytes
SHA-256: f23067499386bbf014e8f9845dd8bd8c6caeb0c063025f625f0058c3efb46e8b

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