Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af967edb0edfed9…

MALICIOUS

PDF

50.1 KB Created: 2020-08-13 23:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bac7d09d65ed9f2fd5e8ae3aa5db36dd SHA-1: 21947d276c457dcab7d2c83d60d4ffe54ec549b4 SHA-256: 1af967edb0edfed9ce7228651beccbdb56a107c408a6d51a2ff3d82bf98f1e11
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded external links, suggesting an SEO poisoning or link farm attack. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a keyword related to a medical condition. While no scripts were extracted, the sheer volume of links and the nature of the redirector strongly indicate a malicious intent to lure users to potentially harmful content.

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=plexiform+neurofibromas+in+nf1 In PDF document text
    • http://repage.costamedicalmarijuana.com/uploads/1/3/1/0/131069839/kozuxugasepofi.pdfIn PDF document text
    • http://files.followmetofifty.com/uploads/1/3/1/4/131437074/vajasilunumafi.pdfIn PDF document text
    • http://bivewonek.madridistasatl.com/uploads/1/3/1/8/131871991/kuwuk-jisugibafuvuni-furuwutif-muzanubi.pdfIn PDF document text
    • http://files.subtek-music.com/uploads/1/3/0/7/130739898/a60d44e.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/1/0431/0079/9140/files/binomial_multiplication.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/ruvubadilakipuzilesavom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/bozuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/9814/9798/files/barron_s_gre_verbal_workbook_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/55988837988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8298/7158/files/mizutibara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3540/1111/files/gabidudolezirovepoxufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5113/0785/files/71439912384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3424/2198/files/factors_affecting_channels_of_distribution_in_marketing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0242/9593/files/sitokizawoligufudatule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0431/9128/files/sovokuxuxupumiwuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/xavubofemeze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6387/7537/files/81951104933.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 8

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_off00008425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8425 5172 bytes
SHA-256: d49dd7676d7adfb7371528891e95e36b93404af420146ce66521cda5d59514f4
font_01_sfnt_off000095ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95AC 10980 bytes
SHA-256: e20bcddc193c7901a3ba4a524510a32170293593c05f0269ea784b2737efd0cf

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