Malicious PDF — malware analysis report

Static analysis result for SHA-256 352a918361157619…

MALICIOUS

PDF

54.7 KB Created: 2020-10-25 19:18:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9469a9965e4e9c440434ae6a43ad28ae SHA-1: d1c4d39ed4aa8cca04aa3cf92088873926895b73 SHA-256: 352a918361157619aa07dc4cae508d7aa47f1f95f093b92d49019dd92dceee2d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/123?keyword=android+game+development+javascript In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378830/normal_5f93a72eebe66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f8e87e07cef1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375907/normal_5f8b706419d4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f873d884e7b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_5f90b33e1fa67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411915/normal_5f94a84765ced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_5f8fd02b2358a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383912/normal_5f8fffe92c13e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369928/normal_5f8e6b6b36d3b.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/mikitinuzukituwori.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/manelol.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/1/0439/0351/6824/files/27080026794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9688/2334/files/bazazosolaredemobanavagos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/apk_palace_party.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/kowalusoxigixavixu.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/autocad_tutorial_for_electrical_engineering.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2454/5430/files/examen_eir_2020_comentado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0767/8915/files/gba_roms_android_pokemon_light_platinum.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a5d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA5D6 22488 bytes
SHA-256: 9dff1a7af283ee3e58ed3eb0f4ca834a6c87c0d4c69700595f1abd2d21d4de6f
font_00_sfnt_off00006d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D87 5516 bytes
SHA-256: c78b032a1d660fd549cbb192ef4dec08c061fd98e1b9054a005531d1571c7ce1
font_01_sfnt_off0000803b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x803B 11264 bytes
SHA-256: cce209d2fdfb659db37c77754d860abff43452e00cbb98dee7e20adce6ab6b15

Open this report in the interactive analyzer, or submit your own file for analysis.