Malicious PDF — malware analysis report

Static analysis result for SHA-256 4728ace2faa38cf5…

MALICIOUS

PDF

42.0 KB Created: 2020-08-17 05:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: af1872de176337361116b121c187b1bc SHA-1: bf2509ccfbcccfbf3d18ede3e6f42ac96259684d SHA-256: 4728ace2faa38cf59eaff49a76c5a15aa59e7e88ceda731e97dea8c9ace58951
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a free photo book software download. The document also features a large number of embedded links to PDFs hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.

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=photo+book+making+software+free In PDF document text
    • http://files.gfox-insurance-agency.com/uploads/1/3/2/8/132815206/gojuwewajogenev_domuke_toveg_tipunen.pdfIn PDF document text
    • http://kogupugo.tessalynnebook.com/uploads/1/3/0/7/130775778/4402210.pdfIn PDF document text
    • http://files.stjohnsmag.com/uploads/1/3/0/7/130776483/2b551af41914e.pdfIn PDF document text
    • http://kakovi.activetwa.org/uploads/1/3/2/8/132814975/mezojirejurupamapilo.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/1/0440/4799/0934/files/40290092408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4042/3587/files/cutting_edge_beginner_student_s_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3331/8808/files/la_fontaine_de_mars_guide_michelin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/91760268682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4870/4920/files/tavewapefit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8172/8151/files/8765590799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/91482658652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/noteratuloniganofubovujot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9567/0432/files/56773839011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/how_to_screen_share_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/66231199592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9291/6891/files/24638368456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/golubofusidenodaro.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_off000064bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BD 5448 bytes
SHA-256: 0b80a40d4d9444fe2cd3430a07c31d8e2a065c527c67a26ebd46199e7e6b5e2b
font_01_sfnt_off00007734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7734 10712 bytes
SHA-256: 81698a02ca46228cccf1fa88089981ba54ccb8bd534965ada65c0025183f3a89

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