Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a50549d2dfcc72…

MALICIOUS

PDF

43.1 KB Created: 2020-10-28 12:22:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0a13315cc048780defa5bb367bce1361 SHA-1: 2aface29583e3498e40787c6d43b72e6cbe4a663 SHA-256: 97a50549d2dfcc72c00cc5a6daac86aeed1aa2465f077cf2317110cd5f5e959a
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://ggtraff.ru/123?keyword=tonka+collectors+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f8b5ff561aab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f95d2400dcec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_5f9149a8b1d25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368242/normal_5f8c62bc150ee.pdfIn PDF document text
    • https://zubosaverebaf.weebly.com/uploads/1/3/4/4/134468350/vigosikabudafep_pavifisozule_dututiniv_vilox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f8d15678079b.pdfIn PDF document text
    • https://toxavikosas.weebly.com/uploads/1/3/4/4/134437834/835307.pdfIn PDF document text
    • https://jopomewimedadi.weebly.com/uploads/1/3/4/4/134465277/3867629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392463/normal_5f922821c7c95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f8f180a94b57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_5f89116c0b283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384480/normal_5f9823cf1bb8b.pdfIn PDF document text
    • https://motadali.weebly.com/uploads/1/3/4/3/134368257/7373843.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408187/normal_5f94a0aac8614.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379841/normal_5f8c8e4a27b25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370529/normal_5f91998d5bbd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393020/normal_5f98012e6d479.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/1/0436/7125/7241/files/inn_and_spa_at_loretto_restaurant.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8274/2950/files/middle_class_income_india.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/2719/1715/files/yamaha_crypton_r_115_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8404/4705/files/wipodobab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7008/6051/files/rujaliwepesakefidir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7916/4585/files/76354691369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/6838538952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0334/5558/files/66482071696.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACC 5120 bytes
SHA-256: efb44854946ec4eb792508504602779003a3236ba7e8b7100926d9b1f0e9b002
font_01_sfnt_off00007c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C46 10116 bytes
SHA-256: f9731d09dae99166fbfda15151f72b0270ab3dafb347506c9e334d156aa6e55a

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