Malicious PDF — malware analysis report

Static analysis result for SHA-256 e329c7fd40109f61…

MALICIOUS

PDF

52.3 KB Created: 2020-10-30 15:03:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: fd42f954b1e0ccbc22d162c3260f8a3a SHA-1: 1588e0e82527c60b617b6f5d70bb0badafb5571f SHA-256: e329c7fd40109f61672d522a931c1c1ba8de3978a4e4121fe7baf8c8a2fa4dd4
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.me/123?keyword=cumulative+adjectives+sentence+examples In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5f8d1f8499223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_5f994ef9d648d.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/1/0266/9671/2384/files/gta_online_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/bhagavad_gita_slokas_with_meaning_in_hindi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/botedafakogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/6534/7748/files/current_ministers_of_pakistan_2020_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df1a0d3a-39a3-4282-87d7-98b0bdb50b11/74280152134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8312/9513/files/clay_boss_pottery_wheel_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/basic_electrical_by_bl_theraja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4759/1332/files/21382668485.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/10th_class_maths_book_solution_in_hindi_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4690/7303/files/is_scl4_tetrahedral.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8904/4651/files/4431991073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e84bed65-226e-49e9-b74c-13e678fd113a/95496690068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/dazurenekuwobavogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3279/6065/files/excursions_in_modern_mathematics_7th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5092/1895/files/yoga_para_principiantes_libro.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E90 5232 bytes
SHA-256: 6b89db35d06db72a55595eac5f197031a727becd729efe635c703cbca7780723
font_01_sfnt_off0000804f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x804F 1828 bytes
SHA-256: 1d12c8220680d5b451702a466cd26f672b1e9e0128993fcb1d345e368267c480
font_02_sfnt_off00008948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8948 10556 bytes
SHA-256: bd62fde88e12e0e9b28a3fc66c8b5993844e6017104dfc85dae3c5f02d9a0781
font_03_sfnt_off0000ad69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD69 16288 bytes
SHA-256: 66b7d4ff2b5c5bb39a0ff5ea84122b7c7b7cdda1ba9b0b3a650452233c73d0d6

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