Malicious PDF — malware analysis report

Static analysis result for SHA-256 12dcff43aabb1843…

MALICIOUS

PDF

45.0 KB Created: 2020-08-21 10:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 05c7c627d592bb505f4411ebe216f877 SHA-1: e9c5d89a15ed1c1b055c91a2a223f577edabc4b6 SHA-256: 12dcff43aabb1843c6474c4fdb3de3d4cb13ceb3ad9b20d394c06ec1cf834c7a
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, masquerading as a 'leg rope length guide'. The primary link redirects through 'ttraff.cc', a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier strongly supports the malicious nature of this PDF, and the presence of embedded links suggests an attempt to drive traffic to malicious infrastructure.

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.cc/pify?keyword=leg+rope+length+guide In PDF document text
    • http://files.surveyofps2.net/uploads/1/3/1/3/131380687/mamuv.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/1/0430/4912/3993/files/pojenogujikamopupoxudix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7530/4612/files/fault_line_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5552/1700/files/jodonagesagatuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/clone_sd_card.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/blue_hawk_tools.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5671/6186/files/22370499331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8407/8503/files/pdf_book_reader_download_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/business_card_maker_program_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/kimya_bileiklerin_adlandrlmas_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8888/7460/files/21171396391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5478/2869/files/ncert_maths_class_10_arithmetic_progression.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9003/5366/files/99887629453.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_off0000735c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x735C 4776 bytes
SHA-256: e8634723a921424708d019aabe33bdd3462a34f0d5e7d0b72f55b558e934c33a
font_01_sfnt_off00008392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8392 10420 bytes
SHA-256: 28af8dbff647cd83c8dc5a117300e522bc901b98475549927c4ded121389a7eb

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