Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcdbfe6fb54fa77a…

MALICIOUS

PDF

41.5 KB Created: 2020-08-13 03:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b397f2b65e94ec6ed81004233a43ca51 SHA-1: 66a0ad0867284e6700f5228dfe5313ba7e500c12 SHA-256: dcdbfe6fb54fa77a3ccef3e4b7a7b0c02e3f0967c17bc2e02d7ebd98952e1f9d
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The embedded URL 'https://ttraff.ru/pify?keyword=strona+bierna+angielski+zadania+pdf' is identified as a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a lure to external content. No scripts were extracted from this sample.

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.ru/pify?keyword=strona+bierna+angielski+zadania+pdf In PDF document text
    • http://files.nabcgolfevent.org/uploads/1/3/1/4/131409128/pulufapul.pdfIn PDF document text
    • http://bibosume.promisewed.com/uploads/1/3/2/8/132816066/e5ab4b.pdfIn PDF document text
    • http://files.afinoentertainment.com/uploads/1/3/0/7/130739996/51ae93f12f5.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/1/0449/1198/4795/files/ernest_shackleton_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/kepadufananoxipekokafasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lurexemip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/stock_market_basics_for_beginners_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8500/3926/files/surgical_cases_for_medical_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/nadisuforipixiderile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3258/8966/files/agnus_day_partitura_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/53043906772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7912/9501/files/bexugulotenodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/loxutiwijadewafulon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/faxenidupilogixezidesofaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/reznor_garage_heater.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_off0000603e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603E 5564 bytes
SHA-256: 14b9fb9b7cb8ea9d3a2d7f1f3da51b704da2e5331427d3fbc7508dbd3765605e
font_01_sfnt_off00007337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7337 11432 bytes
SHA-256: 7952fa2f91b3501e65f1a13e8673ebf73fbec28d9f6b7837fa8594248cb8b12f

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