Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ac1fb1ee8a50fe…

MALICIOUS

PDF

70.1 KB Created: 2020-12-22 03:00:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cd4213b7f58e34d0032a764679efd962 SHA-1: 55b9b640064a3214fe442d4ef7c16f3930e4f1bb SHA-256: 56ac1fb1ee8a50fe2138db1f34cac74e3e01de8bfecb53cbbde233e0a6dde259
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is 'https://gettraff.ru/strik?utm_term=cheap+xbox+360+gaming+headphones', which is likely intended to lead users to a phishing or scam page. The presence of a large number of external PDF links also suggests a link farm or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=cheap+xbox+360+gaming+headphones In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413004/normal_5fa1d1cc903c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406168/normal_5fa097a26ee91.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/270f78751.pdfIn PDF document text
    • https://berovifis.weebly.com/uploads/1/3/4/7/134730871/4962616.pdfIn PDF document text
    • https://ralawuxageg.weebly.com/uploads/1/3/4/3/134319431/kojitonujujenap.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/gogonof/the_pursuit_of_happyness_movie_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5d6290c-bef4-4fc8-adca-c8b0f1e5f56b/67672051893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ff1676c-a302-435b-bf59-1c6398415e92/aztec_empire_map_1500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b40a94-1603-4fbb-a97e-0d5de71bb4fd/walgreens_cool_mist_humidifier_manua.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/android_update_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/ssh_secure_shell_file_transfer_client.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/workbook_plus_grade_4_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/lifilidofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/836ecdc4-c830-44a8-930c-8aaa5dcf8a5b/mutojefejevebit.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_off0000d224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD224 5816 bytes
SHA-256: 111bdd017a858643fe7ac46b83740f9e72ab4dc1aac8b55fcdeba66f03b6720f
font_01_sfnt_off0000e5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C4 11124 bytes
SHA-256: 07ee320fe11832cc73eb66a8b4545e32f51234c1861c307c37fb8c6369bf7bef

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