Malicious PDF — malware analysis report

Static analysis result for SHA-256 3172e7e35e7f5ec7…

MALICIOUS

PDF

41.9 KB Created: 2020-11-01 21:47:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 57748c0fd155153d78a83bed139bee02 SHA-1: 1c69939cbaa0ac967303b48f6be07896e26814d8 SHA-256: 3172e7e35e7f5ec79be029c6439ee1f4dc04ac1509e146353addada7270a6d31
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, forming a link farm designed to redirect users to malicious websites. The primary redirector URL identified is https://gettraff.ru/strik?keyword=sam+s+club+gazebos+and+pergolas+swings, which is flagged as malicious. The document's structure and the presence of numerous external links suggest an attempt to manipulate search engine results or direct users to potentially harmful content, aligning with a phishing or scamming attack pattern.

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://gettraff.ru/strik?keyword=sam+s+club+gazebos+and+pergolas+swings In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372980/normal_5f9b949771405.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408704/normal_5f93b998ab2c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f871e49e6623.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/b1b8b236a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f9bebc93a7c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_5f9bcaf0f00d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5f8a4f55c5d98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393511/normal_5f8f5b564d3c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5f8cc74e464f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f8a30beeffc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f8753f7b8c29.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3079835.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fifomi/download_adobe_reader_for_windows_10_32_bit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6173/9165/files/differences_between_salem_witch_trials_and_the_crucible.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5302/1334/files/reading_glasses_strength_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8142/2766/files/18858606294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5639/8246/files/91596884161.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED3 5780 bytes
SHA-256: 6a8c5948b2e63a3f514e459a1adf50ac60c998f8b932ca7b15c81e7de4e3b0c6
font_01_sfnt_off0000727e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727E 11236 bytes
SHA-256: ff2329a15bcda9d7a2e5394cbebcf348170a6465299ac27b6d0e278af230dd2f

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