Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a4d93b4a1854a10…

MALICIOUS

PDF

45.1 KB Created: 2020-08-19 02:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d61023e7fd0c6ac629b1411cf346f15f SHA-1: 71a53d20c104da757aa910e69a27be116f98bf0f SHA-256: 1a4d93b4a1854a107bff5a0aed4de3cd3cfa0251fae0f0cce25bd7b046032913
162 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.com. The document body, though heavily obfuscated, contains text related to 'Calibre windows 64' and includes the malicious URL, suggesting a lure to download potentially unwanted or malicious software. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve search engine ranking for malicious 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.com/pify?keyword=calibre++windows+64 In PDF document text
    • http://files.alexloer.com/uploads/1/3/0/8/130815026/5508471.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/1/0427/9592/5671/files/65509605401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9218/9089/files/achtung_cthulhu_fr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5172/7513/files/96086220316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9336/0801/files/plsticos_biodegradveis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4535/5682/files/java_interview_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/17980580311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/42613195033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9592/5671/files/15568892545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4995/1140/files/xalirexabezuxoduwujafeti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0413/9416/files/suboru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9956/2911/files/6702967448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6790/6979/files/58806095057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0832/6812/files/85774702805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/tratamiento_nutricional_en_anemia_ferropenica.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_off00006809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6809 5200 bytes
SHA-256: 9a68e6ba6a52ec2467ccfcabe9462202e7dbaf681d15ee3a7d5a922c8874abba
font_01_sfnt_off000079d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D5 14952 bytes
SHA-256: df4858aa5ea7fb0ac570affc067413e301c64c6a0f01eda8ddbd0bce1e630c54

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