Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5039c05e4b88a35…

MALICIOUS

PDF

99.2 KB Created: 2020-08-05 02:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 91d3d6c4ecd19706fd0c7b3c07f5f02e SHA-1: 70828b8161a0c546ff471549feba725d21f58755 SHA-256: a5039c05e4b88a35e51e61bf79fc81b58fbe07f713151ebb435d40eefd6fdcd6
202 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the primary purpose is to lure the user to click on a malicious link, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=cosmic+ray+physics+pdf In PDF document text
    • http://files.sarahmdenn.com/uploads/1/3/1/8/131856333/wiwutixepojofo-fewukunok-marigejigusute-vuvip.pdfIn PDF document text
    • http://files.thejoyfulpalette.com/uploads/1/3/1/3/131398091/f63658ca89c022.pdfIn PDF document text
    • http://files.alongsideautism.co.uk/uploads/1/3/1/0/131070367/5f50adc3b7.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/1/0434/2064/7576/files/zolosiliderilezikufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/lapinonutarukitobukonir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jonamov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9227/0494/files/mitch_hedberg_cause_of_death.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2626/7816/files/gerowebewogazusejigevub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7550/8126/files/dowirotuvovafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6488/4384/files/large_lava_lamp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3412/3160/files/59790661944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/encapsulation_in_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/ableton_live_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/dafaminodavexaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49186839350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5797/1354/files/kosasukujogofuvosot.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 2

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_off00014554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14554 5368 bytes
SHA-256: 066d5e957bbfd8456400f010a36306ce7a765743d499cf9cde5102bde34d4656
font_01_sfnt_off0001576e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1576E 11736 bytes
SHA-256: 9e7c16746c9b0e20dfa4199e44815fbcb611e320a40d838179b6c551ec55fcdc

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