Malicious PDF — malware analysis report

Static analysis result for SHA-256 23eca904c5a1764f…

MALICIOUS

PDF

53.0 KB Created: 2020-08-25 15:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 856919b2e72b17c28a843a26ab098e7e SHA-1: 925dfe528c02520568850014d91f73ecfdf5f779 SHA-256: 23eca904c5a1764ffe1ec68f68dd4cf4df548ffd92084c99f4c50de8b02c4e32
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a review for antivirus software. The document body includes the target URL and numerous other PDF links, suggesting a link farm or redirection tactic. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=sophos+free+antivirus+android+review In PDF document text
    • http://files.brooklynbbfl.com/uploads/1/3/2/6/132681772/3e6eabcf.pdfIn PDF document text
    • http://files.acceleratenewenglandwomen.com/uploads/1/3/1/1/131164372/1121372.pdfIn PDF document text
    • http://nopene.tsrenovationgroupllc.com/uploads/1/3/1/0/131070374/gozajutomoxamebo.pdfIn PDF document text
    • http://kenixila.slcwrestling.com/uploads/1/3/1/0/131070374/gikirezuzap-sogogogi-wonimiligitigav-kujatetiw.pdfIn PDF document text
    • http://files.travelingtolearn.com/uploads/1/3/1/4/131437535/30af65.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/1/0451/3090/7813/files/40516195902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1692/0994/files/wigimimodunezebopobinutem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/pc_assembly_and_disassembly_step_by_step.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/jurnal_tentang_bblr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8835/4207/files/97974529066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6019/1651/files/behaviourist_approach_to_learning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/44602514466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4834/3464/files/bayatilar_yukle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/4429/5076/files/pneumatic_cylinder_working_principle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5592/1822/files/fofiwepebakomuliwovix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1117/8649/files/75173695483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/92458815199.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 3

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_off00009157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9157 5352 bytes
SHA-256: 7373f00ddbfc1e01274f8aed1398d661eec37dfdbed36f5d10d26b188dc75956
font_01_sfnt_off0000a396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA396 10288 bytes
SHA-256: f251ab3c6113c5f28e5071f95f871c63037ff2ea1344caa13f9851401295da37

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