Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0c8581676b0396…

MALICIOUS

PDF

44.6 KB Created: 2020-08-09 10:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 77416ae98f8294fc78cceb71dabaebde SHA-1: b79343dabe2c04dfe635b49cbbac110e0a8ba97b SHA-256: 5b0c8581676b0396d151d043caf9c1732dd9f2b122a17a7a50ca81e79ab7e2fc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with the primary one identified as a malicious redirector. This redirector leads to a URL that appears to be part of an SEO link farm, likely designed to phish for credentials or deliver further malware. The ML classifier strongly indicates maliciousness, and the heuristic firings confirm the presence of malicious redirector links.

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=business+source+documents+pdf In PDF document text
    • http://gawofixej.lueveasdreamtoreality.com/uploads/1/3/1/4/131453194/tobodopud-nanivof.pdfIn PDF document text
    • http://files.ingridlavoiepapercutting.com/uploads/1/3/0/7/130740571/ca1895294b055f1.pdfIn PDF document text
    • http://files.simplysignsofgranby.com/uploads/1/3/2/6/132681579/mikuxexena.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/1/0437/7346/0641/files/69635681225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/dunitedageko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/basics_of_electrical_engineering_interview_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4291/3952/files/defebiwuxinikeriku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2140/9184/files/99589213089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6402/4479/files/soxonowudotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0866/3462/files/96891039948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/2008_vw_passat_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/lozireje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8621/6352/files/genojajorumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7789/4293/files/16913998739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9376/0931/files/number_theory_solution.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 5

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_off00007292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7292 5108 bytes
SHA-256: 3438c43f18dc8235a5c03c3b8a576bf4a466deb2fff7a4149bba825cdadd3a49
font_01_sfnt_off000083e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E1 9900 bytes
SHA-256: 336a1ddf438ec8cd98ead74e671651f02a0876bb2bf320f499ff5c00aa61cd98

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