Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ded7797d701aa8…

MALICIOUS

PDF

64.9 KB Created: 2020-12-23 07:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 67ce7ba952c48519560e352cff71e6b1 SHA-1: c62513701faec2b2a80054fe7a65c8d3b7545fd4 SHA-256: c4ded7797d701aa89a1bac4d52c3c95bebc282653210ff9d5143ef35e141cf3e
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one critical heuristic identifying it as a link farm pointing to malicious redirector infrastructure. The primary malicious URL identified is 'https://gettraff.ru/123?utm_term=photographer%2527s+guide+to+the+nikon+coolpix+p900+pdf'. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/123?utm_term=photographer%2527s+guide+to+the+nikon+coolpix+p900+pdf In PDF document text
    • https://jabiwogox.weebly.com/uploads/1/3/1/4/131453485/turegegowa_ditawoda.pdfIn PDF document text
    • https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/1145237.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/dogigitoninewutobeka.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/gexuwodon-lezoxuvejim-lolis-xeruzojexe.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/fosagoba/michael_kors_berkley_platform_luggage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ff27fca-941b-4749-8c18-916fd3c69103/monopoly_game_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/fundations_level_1_worksheets.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc72365a4d75e5252f326fb/t/5fcc081da87f9f1b19c53e6d/1607206943175/deathrun_portable_download_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cf2e60f2895dc1e766a0/t/5fcb603c551bdc47e7a779d5/1607163964874/chicken_goulash_rachael_ray.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdeb274fbf4ee0481da8a5f/t/5fdf1077459323513bda4e97/1608454264522/vonolid.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/kamotajofenuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a85a0458-b39a-4a6a-b9a0-9b4dcec0e0e7/12055010457.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe0238876a868683c686284/t/5fe111e45e809c0202758d71/1608585700848/aap_guidelines_for_treating_strep_pharyngitis.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_off0000c0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AE 5880 bytes
SHA-256: d843688850d13bfc98a6aeb4cc00a7fae196b7335df8de34fa92dd5a761dabfb
font_01_sfnt_off0000d4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B9 9796 bytes
SHA-256: d24a6f7d369c4030376c86cb6ed0a7c0e61b4cf3e740c40db38d7cd4ce349677

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