Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ace27b466e9a0b2…

MALICIOUS

PDF

44.5 KB Created: 2020-08-12 02:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9a5a9b4d0ecee2b548f4d89da5584857 SHA-1: a79f582b224a04ead6887a51e6c4573e1c8f0b3f SHA-256: 4ace27b466e9a0b2b52414999b74559e2e874f690721864232c3f1bb765e42a6
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. This indicates the document is designed to lead the user to a malicious site. Additionally, a PDF link farm heuristic was triggered, suggesting the document is part of a larger SEO poisoning or link distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the embedded URLs and heuristics strongly suggest a phishing or redirection attempt.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=descriptive+analysis+of+quantitative+data+pdf In PDF document text
    • http://files.orangevalleycreations.com/uploads/1/3/2/6/132682282/timabu-fetagijusaro-zekubusupotew.pdfIn PDF document text
    • http://mivukuwo.cultivatemusicstudio.com/uploads/1/3/1/4/131453177/kifesagosuloza-jumovukoduvewez.pdfIn PDF document text
    • http://files.tres-chic-bridal.com/uploads/1/3/1/3/131383444/bekefapugudug.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/1/0433/4885/2904/files/82262708533.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4246/4163/files/37474987751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6993/9612/files/84595217126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7369/2063/files/comparative_superlative_adjectives_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8209/4494/files/sakanikevoreke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4607/5542/files/tunexupotab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/74089916614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/xugera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1104/6561/files/zejafepesajikukanagemes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3058/5239/files/12078444116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/dotupeniteloziwekenufawar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2215/4908/files/48460714665.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_off00006f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F93 5436 bytes
SHA-256: 504b5fa09b3284864a3d8af9bae31c79036f4404bea20b89cf1a164b3cfb5591
font_01_sfnt_off00008228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8228 10304 bytes
SHA-256: 9e5d1aee507e55c36e1a067b1296b4ce0efb843bd782182ee5d9e64aa4ead2b5