Malicious PDF — malware analysis report

Static analysis result for SHA-256 54b48af62528570c…

MALICIOUS

PDF

64.4 KB Created: 2020-10-31 17:33:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 77b169a2203808226fdfc9997f9615a7 SHA-1: 53aba6c49d763969d0f3c8651913a685dc3b1800 SHA-256: 54b48af62528570c730304bea5eddaa1a99736ebbf94f3a516d76a0020c6811d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of links, many pointing to disposable hosting, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL "https://ttraff.me/123?keyword=pokemon+go+gps+spoofer+apk", suggesting a lure for users seeking specific software. The ML classifier strongly indicated maliciousness, and the presence of numerous external links supports a link farm or redirection attack pattern.

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.
  • 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.
  • 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.me/123?keyword=pokemon+go+gps+spoofer+apk In PDF document text
    • https://loneluripovulom.weebly.com/uploads/1/3/4/3/134364014/3dbb7bcbe44226.pdfIn PDF document text
    • https://wenadexedodoren.weebly.com/uploads/1/3/4/3/134322255/dubarogat.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/movew.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/sokora.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/40c1e54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f871ee2511ca.pdfIn PDF document text
    • https://vebaxifi.weebly.com/uploads/1/3/4/3/134360040/lujok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_5f8f8d9375bbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_5f970331c69b9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/283038e2-de7f-4c26-b377-402070bbe2ba/tazivitejepewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2248/2101/files/download_whatsapp_gb_for_android_4.0.4.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/70400653039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c1de23a-4df8-4bd7-8b61-20eada74ca9d/54771972003.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/jeloro.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_off0000a6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6F9 5256 bytes
SHA-256: 5f7512ad38ac52b7e2c7ce9fde6e5599d4a8ad3d8351db072f53c64a9c0838d1
font_01_sfnt_off0000b8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D1 10952 bytes
SHA-256: cba34d96e92db809ed7fe2f24ae5782772067d27e607948b1a0efb9394dc92bb
font_02_sfnt_off0000de18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE18 16660 bytes
SHA-256: 0b4f9904cc63eeb245c31300081beae5dd130040598f84ad13cd294c90142161

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