Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fca327b44f66fe2…

MALICIOUS

PDF

45.5 KB Created: 2020-09-30 08:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7f1d3bf4c904ea99694c2e4cd9626d1d SHA-1: faffe913f69ab6245d4f28d4815a3e098a89b2ca SHA-256: 6fca327b44f66fe2b3f5ff5654c3d2e1caf678991835030885402bb6f9ddc2fc
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'career paths law book' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of multiple external PDF links indicates a link farm strategy, likely for SEO poisoning or distributing further 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://ggtraff.ru/strik?keyword=career+paths+law+book+1+pdf In PDF document text
    • http://wemanobew.upstagenydanceacademy.com/uploads/1/3/0/9/130969525/lapubodujexu-pejitug-vanutizoju.pdfIn PDF document text
    • http://files.englishlutheran.org/uploads/1/3/0/8/130874317/fipejuvoxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/53ee9245-7dbf-4e10-88e5-2742ebdad045/14818098302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aea436f3-891f-4339-970c-fdcc4a6dc448/39507833384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2ea3b84-9b7b-4d97-af77-76ad4f2e145d/92097822784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/180c7756-f8ea-4306-b2c7-1323c81e7b8c/fuxosinivumenezuxopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5156/0345/files/avancemos_2_unidad_3_leccion_1_vocabulary_b_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9262/9917/files/rivulutoledagolanaridusix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7868/0730/files/diwiwarovupizojuzek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8909/0977/files/57375879470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/4192/3748/files/captulo_1a_answers_realidades_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6516/1366/files/8825737754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/jejenivomibaxebopov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5536/6822/files/walepulisasozobikov.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67CD 5136 bytes
SHA-256: 3a1f9225435fd50ebd221b0251f76b25740cce4ff8f09c3cd03da23780a51964
font_01_sfnt_off00007971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7971 9908 bytes
SHA-256: 8fab6685040ca3e2d7c10c5e1eec09fc08c5aaa845cf46eeef9a1c42053dc335
font_02_sfnt_off00009b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B5F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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