Malicious PDF — malware analysis report

Static analysis result for SHA-256 d782d5dbb03932c0…

MALICIOUS

PDF

42.4 KB Created: 2020-10-27 21:16:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d98acce3e1af553da2395dd32a86d3f4 SHA-1: 3e0cec714a4421baf790620731a02785b1cb7ee0 SHA-256: d782d5dbb03932c06ac5b9bb6c92a0eab8b14acc9d65f709841dda6bb97904d5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous embedded links, many of which point to a redirector service identified as malicious. The document body, though heavily obfuscated, contains the URL 'https://gettraff.ru/strik?keyword=neil+armstrong+middle+school+bensalem+pa', which is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious content, likely for phishing or malware distribution, and uses SEO link farming techniques to obscure its true purpose.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=neil+armstrong+middle+school+bensalem+pa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386333/normal_5f97d27ae7858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377936/normal_5f8cf891c4ed6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403947/normal_5f91a16e29b08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374369/normal_5f8e218938111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f8c23ef2b474.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/pisik/sitaredoxotoverukozep.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/canara_bank_education_loan_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/ppap_reference_manual_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/21776854258.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/patofisiologi_bronkopneumonia.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/describing_people_s_appearance_flashcards.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/13422635812.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/social_worker_cover_letter_sample_no_experience.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1827/5997/files/ribem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4062/0711/files/lev_vygotsky_scaffolding.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/1798/5958/files/understanding_mental_health_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5046/4945/files/heavy_vehicle_roadworthiness_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5668/0098/files/book_of_hagoth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9474/4482/files/gerber_mark_ii_non_serrated.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/el_populismo_en_argentina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3224e96-cd13-488d-b991-6ec9b816ec9c/ace_combat_7_trigger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe57397-b0fa-48b1-8dae-cffd8f984852/arifureta_light_novel_volume_8.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_off000065da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DA 5596 bytes
SHA-256: 923e5e2302cb79bf6f30969379fb11d9591b879f71afda25e1056f1a1267b739
font_01_sfnt_off000078a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A8 10444 bytes
SHA-256: bca22b6a69e985d5df9dc91dada02414a5cb883d8fea02695db20e144b56e6c0