Malicious PDF — malware analysis report

Static analysis result for SHA-256 b71be8257e2ad964…

MALICIOUS

PDF

93.2 KB Created: 2020-10-31 10:03:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1673cc8b4e4c03af3a2e294258f50d79 SHA-1: 9d5371e5e54544ea0449a04889135d9b62749228 SHA-256: b71be8257e2ad9640d20470e88b0527178eeba2a941c34649d26bb8f1d390314
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=shadowrun+new+york In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f8718166d966.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f8f71533cfc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403951/normal_5f956f9c014ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f991a2417978.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f9b3c5e025a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5f8b2c967fc7f.pdfIn PDF document text
    • https://xavixikani.weebly.com/uploads/1/3/4/5/134502132/96263.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/1/0500/6101/7283/files/complete_english_course_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8425/7724/files/jaratukedixivavutepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2927/8119/files/internet_download_manager_pro_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8963/4483/files/5956616671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3920/2197/files/grupo_de_animales_mas_primitivos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3331/6514/files/dell_latitude_e6430_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/45319823992.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9536/7585/files/the_economist_05_may_2020.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 2

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_off00013049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13049 5064 bytes
SHA-256: 25a055c4515aa57828f0179d6144c830e3a166f9ffcdc1ddd1d85ba603e470e6
font_01_sfnt_off00014192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14192 11564 bytes
SHA-256: 08cd29ffa1cc23dea7ff466ad1f8f33da3ba7a22b2623177cdd53fea903b9e2a

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