Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f64275bd58b043…

MALICIOUS

PDF

52.8 KB Created: 2020-11-03 00:59:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4375a72f88916b226961fd877ed49608 SHA-1: dd8be51f8f14198a910e3e599bb10e6dec1bbdbb SHA-256: f6f64275bd58b043ca5d97b9dd431ef07c44f4a6b8ada9558775a35502a51ec8
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://cctraff.ru/123?keyword=tvpato2+apk+firestick In PDF document text
    • https://cdn-cms.f-static.net/uploads/4401703/normal_5f9a8c8ea8f7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f89fb076e169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382412/normal_5f934750917b0.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/sijuwoxujupid.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/915431.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/vagik-rivinovogepix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_5f9e9181edea3.pdfIn PDF document text
    • https://mavegisokelu.weebly.com/uploads/1/3/4/1/134131346/8094394.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/1/0504/9155/6031/files/xisetodoruxujipud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6617/1287/files/two_bladed_sword_idiom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/5294/6367/files/lowrance_elite_5_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48872dcc-afee-4c9f-899a-476098674043/wardlaw_academy_tuition_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cc7b170-8f66-4072-8aaa-7aa40a7ac91f/rozuzaduzupizirutufe.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_off000077c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C2 5180 bytes
SHA-256: c2de439cad5b59458d1a8f2b656fd2437c9d7c26426611df9e134bccc3ce79d1
font_01_sfnt_off00008983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8983 11728 bytes
SHA-256: 316679e4e7401aff4f92db69b595851daa7126f2a2d377dd8470091ca97626ca
font_02_sfnt_off0000b054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB054 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939

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