Malicious PDF — malware analysis report

Static analysis result for SHA-256 15533893a938de93…

MALICIOUS

PDF

42.1 KB Created: 2020-08-25 04:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2b17a6575379470e28fb3b006a3b76c0 SHA-1: d1e36d0f08148640c236915d115068bc541d9454 SHA-256: 15533893a938de93a337ac3c8f1a607715089ffd5e7667ed942f4623021c9c36
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. This redirector, 'https://ttraff.cc/pify?keyword=carbon+atom+form+bonds', is designed to lure users into downloading further content, likely malicious. The presence of a link farm and the ML classifier's high confidence score further support the malicious nature of this document.

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=carbon+atom+form+bonds In PDF document text
    • http://bujika.peorialawyers.com/uploads/1/3/1/3/131381497/8191030.pdfIn PDF document text
    • http://files.creatingrounds.com/uploads/1/3/2/3/132303083/64904.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/1/0431/6381/1999/files/simple_past_tense_exercises_regular_verbs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xutuxajaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/0317/8148/files/biology_for_life_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5333/3145/files/examiner_s_report_acca_f3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/saxawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5625/8454/files/24640375060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/949986333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5491/3943/files/nasuduwuperag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8663/3377/files/sevalumefikodoweb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8968/8731/files/foxiruziberuzuputemajok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1628/9447/files/49652360827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1261/1481/files/apprendre_l_anglais_en_30_jours_gratuit.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_off000067b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B5 5068 bytes
SHA-256: bc0f66f72041ae92b5f6fabae458af018804d6cbdea3ceca58887e4b9219164e
font_01_sfnt_off000078d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D6 10072 bytes
SHA-256: 6f77875affd70f4d67e13c907f76431c77b46a99f5e13fb837a1d0d7a0b74c9a

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