Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f1b43d3c4d55bf0…

MALICIOUS

PDF

34.9 KB Created: 2020-08-15 00:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3fcf674db751edfc73e7760cabfc8d14 SHA-1: 400d266116243266a3273a41398a6f4e127bfd9d SHA-256: 3f1b43d3c4d55bf04242398c595ef19348cdc3cac54fba9e4a93e95bd51d277d
194 Risk Score

Malware Insights

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

The PDF document contains a mass external link farm, with multiple links pointing to Shopify-hosted PDFs. One of these links, https://ttraff.ru/pify?keyword=eating+disorder+guidelines+queensland, is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

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=eating+disorder+guidelines+queensland In PDF document text
    • http://files.sarakross.org/uploads/1/3/0/8/130874101/973424c.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/1/0429/7100/5082/files/zuvesibobusojedivekariroz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0151/1077/files/fimuxolugawil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8766/7103/files/57958841712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9839/9139/files/catalogo_perfiles_de_aluminio_bosch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/pudenidalopadove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/ge_stoves_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8785/4749/files/foxetarus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6971/9196/files/11627144120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/xumexudepibemujawebesiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/sharepoint_2013_discussion_board_unanswered_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4361/1036/files/central_time_zone_abbreviation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0390/7993/files/most_important_characteristics_of_an_entrepreneur.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 1

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_off00004bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BC9 5076 bytes
SHA-256: 0f51fdb865b430d65143c2bb397d6e4b4d799dfe30f830c3fe7e2db319b321e3
font_01_sfnt_off00005d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0E 9940 bytes
SHA-256: cea9501f94f5effdb825a2030b4fae4214623873079b1c0e37221bd916749f7a

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