Malicious PDF — malware analysis report

Static analysis result for SHA-256 4279dc391de815c7…

MALICIOUS

PDF

45.3 KB Created: 2020-08-19 03:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d0f7af4943a37cdd9c0b2cb1c2556e5f SHA-1: 744d7c1437a4d778c0d1209c60b4e658ab42d109 SHA-256: 4279dc391de815c7970bb8cc2e5d32ed13c755bf8dd6d46374f1879ace1562da
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of many Shopify-hosted PDF links suggests an attempt to create a link farm for SEO manipulation, likely to obscure the malicious redirector. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or redirection 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=dubai+tour+guide+pdf In PDF document text
    • http://files.the3x5club.com/uploads/1/3/1/3/131383651/kekifojegav-mimevaferigex.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/1/0432/1948/4839/files/angsana_new_font_family_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/putan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6865/2697/files/race_car_aerodynamics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/tapixugidiludepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1309/5073/files/20935208739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/0011/3813/files/roxeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/5926658187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5411/1656/files/loxodofekaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2790/4165/files/criterios_diagnosticos_para_cetoacidosis_diabetica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/nadukorilulolusaxebegat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/pekawilone.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 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0D 5136 bytes
SHA-256: 17ff6eae390cb26ccd1cf3488e68f9b8f96a55ab96ece25c888e71b9d01d0bb4
font_01_sfnt_off00007c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8C 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00008519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8519 10364 bytes
SHA-256: 2f5bf3ee11428b74e01ff4a2cf11d61db0e187d0671cfa7ac591da4ab5d2227e

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