Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bbc0b677033ec7c…

MALICIOUS

PDF

66.1 KB Created: 2020-10-26 16:57:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 64526f7ef05e57610583448ab0d3c97c SHA-1: ece11d9b38554bb55aafd340bd0f068ea917a5ea SHA-256: 2bbc0b677033ec7c88a1cc46bfcfcc302480095b551bf2554dfc5b6cf4385e1d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to S3 buckets and Shopify domains, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at `https://gettraff.ru/aws?keyword=aurelio+casillas+s%25C3%25A9ptima+temporada+2019+pdf+gratis`. The document body, though heavily obfuscated, also contains this URL and other links, reinforcing the lure. No scripts were extracted, but the primary attack pattern is the redirection to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/aws?keyword=aurelio+casillas+s%25C3%25A9ptima+temporada+2019+pdf+gratis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383138/normal_5f931f85f2a30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f873c90df042.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/levovod/53618136354.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/51851614266.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/saxekujaworopalis.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/91571744117.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/jeremy_bentham_utilitarianism_book.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/emotional_intelligence_test_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0174/7888/files/facebook_download_android_4.2.2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9462/0333/files/spiritualized_lazer_guided_melodies_320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8276/0601/files/49735717602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8606/0189/files/wilobarabalirifazejikige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5941/1626/files/85773678682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6687/9911/files/thank_you_mama_instagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc9f278f-b5b5-4c8c-a093-c36866fd2724/xefelonuwefivepekiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81d45f6e-e17c-4e4c-a5ca-9dd3b1937136/14022204423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/076c5888-7f52-42f8-b0e2-21591fca6eca/tivevalizatozow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ebf977f-8b39-48c3-8ec7-dd1a21c26742/60517532446.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_off0000bcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB0 6088 bytes
SHA-256: 37d2f1380743870186a8df8752ad9ac99db112bfe45361c3e17e5eba134a3b37
font_01_sfnt_off0000d118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD118 12080 bytes
SHA-256: 71d9de045d35cc1e7b3d19a471512c265323c9e2bc66aa9e3ad26c31b59e16aa

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