Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef0ad030bb0dada1…

MALICIOUS

PDF

35.7 KB Created: 2020-08-16 19:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f2d173b29a2ff81a78ddd5e3063275aa SHA-1: f0d9151a1d4c811e1b57839ff8dc08b0a5efa193 SHA-256: ef0ad030bb0dada18c4debbcb53e46ba7b8182c088701c7a4d7a58775d40498e
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. Additionally, it features a PDF link farm, with many links pointing to Shopify-hosted PDFs. The primary malicious URL identified is https://ttraff.ru/pify?keyword=biflex+tc+pdf. While no scripts were extracted, the presence of these links strongly suggests a phishing or malware distribution attempt.

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=biflex+tc+pdf In PDF document text
    • http://files.classicalmusictoday.net/uploads/1/3/2/3/132303382/xobaxezudawatovotaze.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/1/0435/4077/5064/files/53759570152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6086/2882/files/79868221641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85986419962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/gramatyka_jzyk_angielski.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7600/1704/files/96847419414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0991/2480/files/estudio_biblico_sobre_la_biblia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2764/5095/files/asus_router_password.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9765/1352/files/88099516114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/financial_behavior_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7618/1398/files/29992174815.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 7

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_off00004fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE1 4784 bytes
SHA-256: 365f70616d3dd073460b865db2361f8c19a755f8a8cf2f2ead117112641f1190
font_01_sfnt_off00006040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6040 10152 bytes
SHA-256: bf593241e87344746e20c05dbaa1403cf1063fbb11926af0c386b2becf0960c8

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