Malicious PDF — malware analysis report

Static analysis result for SHA-256 d059a1e14956f088…

MALICIOUS

PDF

37.1 KB Created: 2020-11-01 12:48:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: fd3f9c48ee5187d6d9bbc0db3e060e89 SHA-1: df7182a6de7deafdc35e2b59b7797309df1dd1de SHA-256: d059a1e14956f08801eba2f336cbc58c58c21a6a096600d1c99fdce72598f16a
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/strik?keyword=watch+the+joker+2019+reddit In 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/774fa0de-1802-49f6-ad1f-12a2ccfa7916/dekiwiket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaea9d4e-cdaf-4234-9826-eb31ea310ae6/febufixatenizikoruvaneno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07e74b10-646a-4ceb-98de-80db2c8142cf/56018578407.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/antrenmanlarla_matematik_1_zm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4068/6258/files/wupakujutizezifumabele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/8794/5622/files/yupptv_apk_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/2567/5421/files/14523613890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7088/4514/files/discount_tobacco_store_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5660/2529/files/68994169365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d5c46a5-6154-46d1-bf36-79804d1f1fb4/dixamerubokatojigako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83bc6f66-34aa-4306-a721-6aee4d41ae5c/49275461395.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/autobiography_of_yogi_hindi.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 1

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46FD 5136 bytes
SHA-256: fa48d78c1befca55133400a3deb6c6e504da5f230e77afd9b8ee2d683f050aea
font_01_sfnt_off00005899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5899 9680 bytes
SHA-256: 005c1509e21fb1d56244cc15fee7abcd4a879d6f00610361a48c10e3eecffa1a
font_02_sfnt_off0000799b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x799B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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