Malicious PDF — malware analysis report

Static analysis result for SHA-256 7221fb0291918bc6…

MALICIOUS

PDF

59.9 KB Created: 2020-08-11 00:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 43d6a69e38948cb8fff25faa0427bdf8 SHA-1: 433f0f587217a6b05d8596b9fd8c2b773002008b SHA-256: 7221fb0291918bc612be47e3717d80630888ae77f1dcdcb5f09adcdb8412f575
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, many pointing to a redirector infrastructure at 'ttraff.ru'. This redirector is likely used to funnel victims to malicious content or phishing pages. The presence of malformed streams and ML classification further indicate malicious intent, suggesting the PDF exploits vulnerabilities or is part of a larger attack chain.

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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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=anaplasma+platys+dog+pdf In PDF document text
    • http://files.txagriwomen.com/uploads/1/3/0/8/130814235/belanole_vujibibokof_wijumato_zimatama.pdfIn PDF document text
    • http://files.tommyjose.com/uploads/1/3/1/0/131070113/rukep_lexinixe_rubuwitujonuto_taboselu.pdfIn PDF document text
    • http://kazewuma.most-wanted-ent.com/uploads/1/3/0/8/130873995/wewegaworo_fijudojogula.pdfIn PDF document text
    • http://files.melodiousstrings.com/uploads/1/3/0/8/130874189/605494.pdfIn PDF document text
    • http://files.kickit2cancer.com/uploads/1/3/1/8/131856234/jaborumon.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/1/0433/0687/7080/files/45035229099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0737/7567/files/15920314426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4207/7846/files/38142862061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7874/1155/files/school_annual_report_by_principal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5190/8249/files/nemuvox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/62451085688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5713/5264/files/26640643808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2016/3999/files/python_tail_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5978/1538/files/79704666955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/8745/7432/files/business_writing_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/rawolefajubozurujorimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4903/1592/files/double_column_cash_book_questions_with_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6339/2921/files/free_new_year_wallpepar.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0EE 5356 bytes
SHA-256: 0ab5f9a16d5b4f3901c00d49facac55d322a4ec71fbb73b65a9cf34f0394956f
font_01_sfnt_off0000b320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB320 15356 bytes
SHA-256: a4a6566ca4495b2ba7e55b71eb6c92915d2e3612d63ba02cb432ec9f46e0b2a0