Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9c3a8ef6f68bea0…

MALICIOUS

PDF

55.7 KB Created: 2020-09-17 00:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 10884a6125298b342015016c886d8c90 SHA-1: dc2ef4013d22f008488d80424cc9ac25d487b37b SHA-256: b9c3a8ef6f68bea0c0b998642358d169806cef47a1c114b98980db981b5ad2ff
192 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links, 'https://ttraff.link/wix?keyword=apk+amc+security', is identified as a malicious redirector. The document body also contains urgency language, reinforcing the lure to click the malicious link. No scripts were extracted, but the primary attack pattern involves redirecting the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.link/wix?keyword=apk+amc+security In PDF document text
    • http://files.fullforcesdfit.com/uploads/1/3/1/4/131482953/bb040299ebab.pdfIn PDF document text
    • http://rikop.bestofbothworldsnc.com/uploads/1/3/1/3/131398455/xanonu.pdfIn PDF document text
    • http://files.canterburynuts.com/uploads/1/3/0/8/130874213/zalepu_xumamasepo_jenapolij_nelawovude.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/1/0438/5452/8677/files/bwapp_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/35068418170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6223/1201/files/hindi_project_file_class_12_cbse.pdfIn PDF document text
    • https://3a8687ec-9628-404a-9b2a-bd310fec1810.filesusr.com/ugd/405339_a716df50c0c842da87537a59ce535934.pdf?index=trueIn PDF document text
    • https://f5b580e6-833a-4a23-856d-61b61956e432.filesusr.com/ugd/e6092c_029bd91824644884a82296c9ba3f05fe.pdf?index=trueIn PDF document text
    • https://f33e7f05-1d34-4746-b687-3ba1ae334a3b.filesusr.com/ugd/ef0078_2aea00b465ec4b62b2a2ef10fe6a5cbd.pdf?index=trueIn PDF document text
    • https://ba246c65-9584-4895-a935-000002cfe93d.filesusr.com/ugd/5aec95_41b32e84d4924710bea951de4515c6b6.pdf?index=trueIn PDF document text
    • https://6e7e776b-753c-4b3a-a84d-4086bf3fbb55.filesusr.com/ugd/d99ef3_3297ab2e7c0e4a3f951e6e4ce58fb5f0.pdf?index=trueIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDC 3500 bytes
SHA-256: e42012e0a20de963b83d9bf476a601e1e1e43fced2be95fde6cbf99cc1139275
font_01_sfnt_off00007c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7A 5204 bytes
SHA-256: 1057f9ce64817ba3c9abc0d12bb70e1cf85e9af546bba254fd9f071f1cd4c15b
font_02_sfnt_off00008e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E15 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_03_sfnt_off000096a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96A3 10812 bytes
SHA-256: c0ce68530d6fcbd21d5425d3c35cd5a8434f776a0b8e413a78f5b96b01331086
font_04_sfnt_off0000bbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD8 16144 bytes
SHA-256: f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d