Malicious PDF — malware analysis report

Static analysis result for SHA-256 253ee0a39941f27e…

MALICIOUS

PDF

57.8 KB Created: 2020-10-30 10:29:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 7bf92f063b70c3225b71cf80b97fd082 SHA-1: 4fd1af003a382a173458262a1a1a80440d813147 SHA-256: 253ee0a39941f27e6cc06817d82a81ce50d7c2e7b20c0b1a75ea00151a2e5ec1
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 of which point to a link farm designed to redirect users to malicious infrastructure. One prominent URL, https://gettraff.ru/pify?keyword=my+strange+hero+kdrama+mydramalist, is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to exploit users through a deceptive link farm, likely as part of a phishing or scam campaign.

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/pify?keyword=my+strange+hero+kdrama+mydramalist In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6928/2725/files/31480976485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8039/3915/files/mackie_402vlz4_mixer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/tetawegukezewos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4611/4757/files/retinopatia_hipertensiva_articulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba663669-e75d-4a3b-8e99-7fe47003bb61/tovozusakubimisukaxudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4523723-f91c-4a66-b985-711d2f8a8746/steven_universe_s1_e1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7374/7140/files/design_as_art_bruno_munari_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/case_study_of_bhopal_gas_tragedy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6542/4021/files/33895498244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8028/0989/files/90107305710.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9628/4577/files/origins_lightning_staff_upgrade.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/cracking_the_money_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bba6fc4-a700-491a-90f5-eb79959084fe/ppsspp_gold_download_apk_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc39a3e6-270d-4fdc-b171-4c3c9f32ce83/auto_shop_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84e9d138-dac0-4fc5-875e-c929b686c592/kugukipazuwogo.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/kisner_and_colby_book.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000ab48.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAB48 27016 bytes
SHA-256: 4d4c499a77c11f133daa53aeada1dd42ba53df42ef502c56982533a03243f7b7
font_00_sfnt_off00007634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7634 5412 bytes
SHA-256: 6bdbd250a736bc28b2fbbfa59099cf9b82e543867a2e4f86b5238ab5fc829692
font_01_sfnt_off00008883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8883 10064 bytes
SHA-256: e58ecd0ac7c7e6840ba6d966401746ebe11dd5c83812b663e28aa338c42b50d2

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