Malicious PDF — malware analysis report

Static analysis result for SHA-256 895acd08c693e0ef…

MALICIOUS

PDF

58.3 KB Created: 2020-10-31 00:17:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 661029a653d9ba2ff34f5ec75f7cfbc2 SHA-1: 9c5474df82258e57918ae9dbd647616413aaad53 SHA-256: 895acd08c693e0ef37192c3a706a1de0e3b1a7d09cd603bb7cf64a4e29130cdd
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to manipulate search engine results or direct users to malicious sites. The ML classifier also strongly flagged this PDF as malicious. The embedded links are the primary indicators of malicious activity.

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.com/123?keyword=record+of+lodoss+war+wiki In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_5f939dadd79f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_5f8c2bd53bf13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_5f8e63ea67500.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425924/normal_5f9875740cede.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/debce6d6-66a1-45a2-b6e8-1edc097c1dbc/30313626040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe675b6-92e4-41ad-8791-e3c77898d7ba/temple_of_the_dead_divinity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ff1fca0-2658-4cfb-8d2e-60c0be579d18/6505381965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7948/9950/files/supulobukotipunoliwisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d603445f-23e5-4e65-9fa2-d70fa0e059b8/hack_de_monedas_agar._io_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8211/0877/files/1620095039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0459/0742/files/forgotten_memories_alternate_realities_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fd01583-fd71-4b41-af01-52dbf5044e89/72861794343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e175d05-b541-423d-98b4-070b318ead82/44199284639.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D7 4780 bytes
SHA-256: 00a83dc7addd936a6948f3846e9ed723abf61a1e997716c254a72e49f4ebe387
font_01_sfnt_off0000aa33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA33 10644 bytes
SHA-256: 02d37e7cac8f50469e8056397c64c976ec92093ae81237720d22fd24857bda1f
font_02_sfnt_off0000ce52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE52 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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