Malicious PDF — malware analysis report

Static analysis result for SHA-256 c51dbfca8adb7199…

MALICIOUS

PDF

43.8 KB Created: 2020-08-04 21:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9a23916d5f25db3aa6a2e98cf7d4f4bf SHA-1: 024ebfb02f6cbc44fb8aca785d00f313b4a489a2 SHA-256: c51dbfca8adb7199176fd42097025e28f7bbebb10991a9f45f48f2eb916c136a
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=arbitration+act+2020+bangladesh+pdf', which is flagged as malicious. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing.

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.com/pify?keyword=arbitration+act+2020+bangladesh+pdf In PDF document text
    • http://files.sustainablewaresonline.com/uploads/1/3/0/7/130775992/golud_nazegugowanawe_zenino.pdfIn PDF document text
    • http://files.tweedvalleyhapkido.com/uploads/1/3/0/8/130874422/011f82f93.pdfIn PDF document text
    • http://files.nmcawomenscricket.com/uploads/1/3/0/7/130775384/1775406.pdfIn PDF document text
    • http://files.printingeria.com/uploads/1/3/2/6/132681513/2601647.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/1/0430/4021/1097/files/taloputuxunetefikef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4335/6821/files/nexetiregirarukorutipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8624/0162/files/edgar_allan_poe_libros_el_cuervo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0166/6969/files/62989120999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/21205862803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3320/6682/files/hex_editor_pokemon_battle_revolution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/22384297402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6667/0745/files/672165536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1402/8444/files/hampton_bay_fan_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7713/0647/files/reducing_fractions_calculator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/banojuwoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zekimopesafirizaxos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5993/6421/files/76210202369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0078/9154/files/3929022290.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B71 5820 bytes
SHA-256: 96a31d6aacd63f93f1f8f6bd15b4178846bd69bf1d768da7d38b2c62c6446fba
font_01_sfnt_off00007f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F35 10108 bytes
SHA-256: 45f7b4ad83d1b6db9b97a5e28bbedfd0e2340fc05abd4f6034e5263ee38bfe85