Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66b0823761a46f4…

MALICIOUS

PDF

42.8 KB Created: 2020-08-02 16:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4bdac7712cbad718d1b83675ac6d30f8 SHA-1: 3d4de436f0e4434e3c4d6d5201982742407815f0 SHA-256: c66b0823761a46f46cb51d4dbffec04198c5a8610eba5d08dc82c0b53f1821f8
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL "https://ttraff.com/pify?keyword=net+credit+sales+formula", which is also listed as a malicious redirector. This suggests the document is designed to redirect users to malicious infrastructure, likely for phishing or malware delivery.

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=net+credit+sales+formula In PDF document text
    • http://files.gracejiang.info/uploads/1/3/1/8/131856627/4945528.pdfIn PDF document text
    • http://files.costaphotoart.com/uploads/1/3/0/7/130738823/4707382.pdfIn PDF document text
    • http://files.bethanywelchfitness.com/uploads/1/3/0/7/130739699/noputixijuwozef_liruse_vufile_nofibejikiti.pdfIn PDF document text
    • http://files.elginparkathletics.com/uploads/1/3/1/4/131406413/xikudenaw.pdfIn PDF document text
    • http://files.charliecremen.com/uploads/1/3/0/8/130813373/lalulewadunovej_fewedufelebemip_weziroma_gemugo.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/1/0429/9830/0823/files/embed_images_in_illustrator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72163988246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38461358607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89352644259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/77273325290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3049/4882/files/23419479114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8658/5749/files/zeredikabazilepivupup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8958/3514/files/sutakobujigejetipareb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/xudowarokidegawewetesuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9005/1221/files/bizuzuxide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/moduzibupazokemekowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/98917628950.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 8

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_off00006932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6932 5136 bytes
SHA-256: 28e7e6bbc8c91b6a27cc5a560a697c140639b4d4cb6940783ac1008e6b85f346
font_01_sfnt_off00007a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A98 10372 bytes
SHA-256: 0f005889d5dd1e32a8236553a98f9f888903129121a801b88bbfe2f9161245c3

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