Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc1834d58adbe93…

MALICIOUS

PDF

38.2 KB Created: 2020-08-28 05:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 58b38271f4800dccf608781e76ae8a48 SHA-1: 132c28c5d073084a116a6aff4579cda23a50e121 SHA-256: 4bc1834d58adbe932ad4eabb17ad4b97888557155461631a1dc8c91a05e9ff23
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector service. The primary malicious URL, https://ttraff.ru/pify?keyword=school+dance+free+download, is designed to lure users with a fake download offer. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on various domains, suggesting a link farm used for SEO poisoning or traffic redirection.

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=school+dance+free+download In PDF document text
    • http://jufifoda.pwdchicagoclub.org/uploads/1/3/1/4/131453133/a66bc2.pdfIn PDF document text
    • http://gupax.zoehounta.com/uploads/1/3/2/7/132741100/c07b8848ba.pdfIn PDF document text
    • http://files.wineandfoodsocietyofhobart.com/uploads/1/3/2/7/132740637/0eedf937.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/1/0436/7430/4662/files/adobe_acrobat_windows_10_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3615/4773/files/razetedipuwib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6090/4615/files/gerubogamipetewot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7927/7467/files/22641579853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/engagement_letter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/sanizito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/freaks_geeks_and_asperger_syndrome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7273/2836/files/how_to_reduce_file_size_in_illustrator_cs5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/fofibuwetitutosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1275/1523/files/81144712234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/barupabobupuwubarawusarug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1712/3478/files/carnivalee_freakshow_normal_font.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/8273/7816/files/medical_mycology_case_reports_open_access.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_off00005607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5607 5128 bytes
SHA-256: ecbe3cf2b1a22163312452743d16fac2cc5a851138ec396dba7bfb6c95f009c0
font_01_sfnt_off00006779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6779 10772 bytes
SHA-256: a59e08c7eee804c2bfaef2f893086f79f9a0cbbf4de7df27123c13783373b40c

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