Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d06939fa65371ae…

MALICIOUS

PDF

71.1 KB Created: 2021-01-01 14:39:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ac0750657275886624381531635af63f SHA-1: 198467c131ce7fb80dfa5d220b83a46ce88f66bd SHA-256: 3d06939fa65371aedfb9035ff21a414b087a0e46b63e94c4927b40ecf7132585
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a high ML score. The document contains a large number of embedded links, many of which point to link farms hosted on S3 buckets, suggesting an attempt to manipulate search engine results or distribute further malicious content. The primary malicious URL identified is traffking.ru.

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://traffking.ru/123?utm_term=rooftop+snipers+unblocked+6969 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4467912/normal_5fee425885334.pdfIn PDF document text
    • https://buvonidodiwa.weebly.com/uploads/1/3/4/3/134332647/ralopupameger-kokibi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447450/normal_5faed7d46bf43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445331/normal_5f9fbb66de996.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/mijedusovineti/38967445252.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/65271475188.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/optimus_prime_transformers_armada_toy.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/free_plural_noun_worksheets_2nd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/custom_horizontal_progress_bar_in_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/ccleaner_slim_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/ayn_rand_the_husband_i_bought.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/financial_report_writing_format.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/75018256539.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_off0000d94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94D 5460 bytes
SHA-256: c3106c96aa6e5f0f5f8f94ef590d648f8f31744c96cdcfd306d04983fc555b2f
font_01_sfnt_off0000ebf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF2 10356 bytes
SHA-256: 137bde4e053a16a459721e81b2ffa4aef295880707595c5bbe464c59d1c2048f

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