Malicious PDF — malware analysis report

Static analysis result for SHA-256 a123028f63bb9256…

MALICIOUS

PDF

43.6 KB Created: 2020-08-21 04:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 93bb062cfeb1819816f03d1c66cd574d SHA-1: e93071eb0e0d31da0746c33faa19c32ebf6c6396 SHA-256: a123028f63bb9256061094a127ac6ca9bfeee4406873789c6c21a3c0ce15a366
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO spam and phishing. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector, suggesting a lure to a malicious site.

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=predator+2018+imdb+parents+guide In PDF document text
    • http://files.bellbrightaussies.com/uploads/1/3/0/8/130814861/juzaw_tudasupefaxugi_kabanokajamiwi_namegi.pdfIn PDF document text
    • http://files.psychtxscilab.com/uploads/1/3/1/4/131406086/bukuzogezebezajuxu.pdfIn PDF document text
    • http://betuba.777worldwidebibleprophecy.com/uploads/1/3/0/9/130968984/rimokejenimufun_rurojiren_tawubek.pdfIn PDF document text
    • http://files.oliviersbreads.com/uploads/1/3/0/8/130813988/2ac932c8669cf05.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/1/0435/1187/3688/files/bifet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5469/3541/files/97435819007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/15065458136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/20775655801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0954/0257/files/crianza_de_camelidos_sudamericanos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8706/0375/files/42122275597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2804/4193/files/grade_formula_in_excel_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/vebipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8901/6472/files/14818319353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/air_pollution_and_control_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6246/8516/files/nivutirewifujuronil.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 4

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_off0000681b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681B 5908 bytes
SHA-256: 7f5c2d8267c25a46991ae6051e7b7443fe422d07d15bc5f21ba82a2204854e84
font_01_sfnt_off00007c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C10 10896 bytes
SHA-256: 842629cd65596f623ca835ad935b3ffe77529afa26e8eb5fb9f2459564242cee

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