Malicious PDF — malware analysis report

Static analysis result for SHA-256 e285b2b9a3914a77…

MALICIOUS

PDF

73.4 KB Created: 2020-12-31 09:28:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b98c29794b41136ccada8048cc5815f9 SHA-1: 72f41830bdddb41d669dfa0e9e5568fccf692fe6 SHA-256: e285b2b9a3914a77921adec885ee3e8e6bd9faab6976ff5780c3640402627d3a
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier. It functions as a link farm, containing numerous embedded URLs, including a critical redirector link to 'traffine.ru'. The document's structure and content suggest an attempt to disguise malicious links as legitimate content, likely for phishing or to distribute further malware. No scripts were extracted from this sample, but the presence of many external links indicates a strong intent to redirect the user to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=aaa+auto+insurance+texas In PDF document text
    • https://zimegusak.weebly.com/uploads/1/3/4/6/134605775/kexisedakuvopu-nijanafiwo-zewep-fiwavopoju.pdfIn PDF document text
    • https://guzugalaxob.weebly.com/uploads/1/3/4/7/134767263/65250e.pdfIn PDF document text
    • https://sukojafura.weebly.com/uploads/1/3/4/6/134632918/xigimibogi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452835/normal_5fdbd94660fe6.pdfIn PDF document text
    • https://wimelavejitovuv.weebly.com/uploads/1/3/4/5/134597731/7793617.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5fac3faa352f8.pdfIn PDF document text
    • https://jijobowuzum.weebly.com/uploads/1/3/4/5/134590228/0289f1eeb7.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/wanasuvedigo/annie_allen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d1caa9-87a3-4629-989f-17513b25ee77/bamed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca42d3a9-ae9c-44c9-8782-5533d495d967/wikimegizura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69f5536a-707c-42b9-ac90-23cc523ad833/stickman_shadow_super_saiyan_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/cyborg_full_movie_hd_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/071ec63b-4651-49d8-903c-7f846afab681/realidades_1_capitulo_4b_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/vilajolilumebexi.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/78359234888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abc25d1a-152a-4892-a1f5-0f503e64b36c/canon_u052_error.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/053bbedb-f10c-49bf-ab45-9c688520edff/55024921058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/661a6a3f-c97f-4e50-8a56-17f6e5cd97fd/bawomoposaxanevajiwote.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_off0000e2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2ED 4816 bytes
SHA-256: 0802b0938e3ea181bc9d674a57b5253053582c20a893642cb29b52026f5ea8fc
font_01_sfnt_off0000f363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF363 11316 bytes
SHA-256: f3269fc45335d400d3ccac35f98f7f03392e9beb7914bf548f2238c1522b8303