Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54d9f2076123bdf…

MALICIOUS

PDF

44.1 KB Created: 2020-08-07 14:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 590111c832425afacc946fa458af9c07 SHA-1: c8e5599b2d2a8bb021eb6610ab34277fb6a448bb SHA-256: c54d9f2076123bdfdd1fe0d38d5072904883f6ddc0415f763065d3e1f24bfd07
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains numerous embedded links, with one heuristic specifically flagging it as a malicious redirector. The document body, though heavily obfuscated, contains text related to learning English and includes the primary malicious URL. This suggests a social engineering attack aiming to trick users into visiting a potentially harmful site by offering a lure like a free book.

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=learn+english+in+100+days+with+guaranty+urdu+pdf+book In PDF document text
    • http://files.jessicavalenzuela.com/uploads/1/3/1/3/131379899/415988.pdfIn PDF document text
    • http://files.candleliteinnludington.com/uploads/1/3/1/4/131453247/f4f476e0c7f09b6.pdfIn PDF document text
    • http://files.allamericandancefactory.com/uploads/1/3/1/3/131379761/b62847fa3f.pdfIn PDF document text
    • http://files.flashfoto.com.au/uploads/1/3/1/6/131606803/safibi_bidowixe.pdfIn PDF document text
    • http://jafave.17southstreet.com/uploads/1/3/1/6/131637136/sinenozev.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/1/0437/5196/4830/files/96740060948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dovaxetudomorunuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7331/5740/files/thani_oruvan_full_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4461/5830/files/maxulakonajeda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8564/7272/files/ubuntu_ms_office.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5108/0087/files/unlimited_power_tony_robbins_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/49786675864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9445/0078/files/limewire_4._18_8_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5847/0813/files/88323339587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4737/0402/files/thesaurus_synonyms_and_antonyms_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6988/8929/files/minecraft_pe_mineplex_server.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/kikedubadexasabisovojosam.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_off0000549f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x549F 5836 bytes
SHA-256: 3bea5d97f4af82abdfb5a2233ed9b7285ad112c462a53221913eab5a6111d524
font_01_sfnt_off00006892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6892 10508 bytes
SHA-256: a95e5e0f8e33477fe307df294042e95b9284187f5b416edeed6f8f3ef230411e
font_02_sfnt_off00008cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB9 16324 bytes
SHA-256: 0cc5cd463905e7ac98888911a5f73249ead295a7e5eb112f1f0e854372cd59fe