Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0757ef12c3bc192…

MALICIOUS

PDF

68.2 KB Created: 2020-10-31 11:06:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 14c030aa97ca625705a6f883760a4ae4 SHA-1: 8165de5c74a6454dda047e5fdf2612b6014d75e8 SHA-256: a0757ef12c3bc19268e157633c1100c8db37c7dcaffdd7f09af5515bbe531dd8
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which, 'https://gettraff.ru/strik?keyword=preach+my+gospel+lesson+1', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text fragments related to a gospel lesson and the URL, suggesting a lure. The presence of numerous other PDF links indicates a potential link farm or SEO poisoning attempt to distribute malicious content.

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/strik?keyword=preach+my+gospel+lesson+1 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426085/normal_5f9b4608c9989.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/38fcd24fbbe8ee.pdfIn PDF document text
    • https://merigufut.weebly.com/uploads/1/3/4/3/134357701/6eab69b46f724.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/lakadutof/diveluf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0129/7072/files/haunting_ground_puzzle_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1429/7032/files/wuvoxupoferukajowigaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7270/7496/files/biological_anthropology_concepts_and_connections_3rd_edition_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6376/9795/files/kubota_bx2200_hydraulic_filter_cross_reference.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/amicar_package_insert.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3134/3516/files/classroom_mathematics_grade_10_textbook_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03453cbb-53de-471d-b848-ce23f1c075b0/zedimuziluxetagenixedax.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_off0000cde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE0 5500 bytes
SHA-256: 7b60ba31fa4fe3c4962c5fe1b5c52d1d336e10ce52fe5c55af853c0117d0b47a
font_01_sfnt_off0000e07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07D 10432 bytes
SHA-256: 5e0b6b9c37c2ff0a9dfeb9e6033c73b8ba01210300e353a54bcf0871fca74cdf

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