Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbfc75ff6258b857…

MALICIOUS

PDF

44.7 KB Created: 2020-08-24 10:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3e8079ad0ddfeec7ae192f756791e96a SHA-1: cf1bd3a886736bade9cce4b82de63b6565a7bbbb SHA-256: fbfc75ff6258b85702757d87a8034f4d7fbed0dd2d9d9c7e20337cc10e1b7ca4
194 Risk Score

Malware Insights

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

The PDF file exhibits malicious behavior through its embedded links. A critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=arcon+bold+font+free'. Additionally, the file contains a link farm of 14 PDF documents, with the first link pointing to 'https://cdn.shopify.com/s/files/1/0433/7709/8902/files/descriptive_writing_topics.pdf'. This suggests a social engineering or SEO poisoning attack designed to lure users 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=arcon+bold+font+free In PDF document text
    • http://files.rivalgates.com/uploads/1/3/1/4/131455475/87388f1ae20aca.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/1/0433/7709/8902/files/descriptive_writing_topics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5754/5365/files/pazopubejisudogevijew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0292/9047/files/jowekeboxexufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/surrealismo_literario.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/64451958127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/tuved.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4283/9455/files/liftmaster_professional_formula_1_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/kirubareredevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3983/4791/files/michelangelo_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/43524877441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/62229260666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/6010/4090/files/student_attendance_management_system_android_source_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4979/3174/files/music_theory_for_computer_musicians.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D62 4756 bytes
SHA-256: c2be80a6618581abf728d5658648508c1be777aedb29fc8adb37e33096c1dded
font_01_sfnt_off00006d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D95 10308 bytes
SHA-256: 6b3c7c069e5e38c5561532f8c7accb3e594da751607a3344dea8a8ff41f92d7b
font_02_sfnt_off00009124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9124 16084 bytes
SHA-256: fb27248ec02d804caa0ce6a8dd06a8f0f211157336bc50f6c382585ff5fe3da3