Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7815d7c6d8e0261…

MALICIOUS

PDF

39.4 KB Created: 2020-11-05 11:14:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8cafc0de255ea1835c9f98c42dac4748 SHA-1: 322e20624fab7a415287512454569abd3e569774 SHA-256: f7815d7c6d8e0261f668f24f8ddd486bce2e83a109c95373ada08269bee5ad9e
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links, many of which are hosted on disposable domains and point to redirector infrastructure. The primary link identified, 'https://gettraff.ru/strik?keyword=18+wheels+lyrics+and+chords', is flagged as a known malicious redirector. The document's structure and content suggest it is part of a link farm designed to drive traffic to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=18+wheels+lyrics+and+chords In PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/digip.pdfIn PDF document text
    • https://luwigemo.weebly.com/uploads/1/3/4/5/134597726/lewamulel.pdfIn PDF document text
    • https://wazajodowefode.weebly.com/uploads/1/3/4/0/134017502/domomipunel.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/2dfdd6fead9cf82.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/xunufuno_jepofelikekoxu_vukotutinuwegim.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/54ee2dbdfc4.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/jamokaroxoj/49237202450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5f04ea4-3c34-425f-a815-634344873b94/laxuwovisobavomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f842a028-74fc-416d-8d7a-e4747fb4f4e9/49578699369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/walkman_apk_android_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6424/8470/files/pemizofojedoguk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5668d0fa-822c-45f4-80e5-6ed260356b9f/nursing_care_plan_for_fatigue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3401fc48-0c2d-41a9-bf7d-7343266b6ed2/downloader_apk_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54c43837-1a6a-41fd-910d-0a8aaaf7d2dd/39505918456.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_off00005c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5F 5372 bytes
SHA-256: 4080af42955367e0c5981a51d6493bf9baaa918510f2e790ff96b78183d2997c
font_01_sfnt_off00006eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB8 10044 bytes
SHA-256: 06df4d4c81324ad55afce15c6a5e9f88b5abea1bcd64b2b5426731b1a0213ff6

Open this report in the interactive analyzer, or submit your own file for analysis.