Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff042e1615ae3fe4…

MALICIOUS

PDF

38.6 KB Created: 2020-10-09 11:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 82a88ddb07f2325b0d5a1f72872aa6de SHA-1: 95f061c991d757713c96a830e238e12153f782a0 SHA-256: ff042e1615ae3fe46cbe6122b46fb3229767746da9ff2d256733e618ac78e639
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 external resources, classifying it as a link farm. One of the primary links, 'https://cctraff.ru/strik?keyword=the+ultimate+guide+to+the+presidents+assume+the+position', is identified as a malicious redirector. The document body, though partially corrupted, contains text suggesting a lure related to 'presidents' and a guide, which is consistent with phishing or malware distribution tactics.

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://cctraff.ru/strik?keyword=the+ultimate+guide+to+the+presidents+assume+the+position In 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://cdn.shopify.com/s/files/1/0437/1306/9210/files/arm_wrestling_table_amazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8402/9854/files/nevuzomabedubinikaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9444/2145/files/nimemapaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2480/0168/files/54091343546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fc4a51b-0e1e-4da7-85a4-2f37a6e8303d/91516738460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ce1736a-1237-4d41-b877-fd08bd5855cb/77701787022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b629c76a-d825-4c64-a5d5-2d5c5c34c3b6/salenafisasat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7639f63-a479-4815-8533-f2d88e17de3e/bowoluvumuwogapakasefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a77aaeb1-b0db-400e-910a-71e9cb1715e3/luputusux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d41000d-aeb2-46bd-93a9-12eceadd1b26/nawebijedefole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c5610f3-b063-4fdb-add7-6f09719f862a/84413016539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f860b07-231c-4b36-93d6-8ec6a2e1f050/23202996092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dbfceb5-5b0d-4837-8796-5ca41feff078/rekofejalis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49bc4d51-b08b-4393-8e19-af201c8ee7ef/54007085785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb21b5b4-aafe-4c14-8d17-a48301e85488/38128204551.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_off000049b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49B1 5204 bytes
SHA-256: 83c710526267bc48afe061576813cdc858452185dd55cf4c1b705c8207ad00fa
font_01_sfnt_off00005b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B32 10492 bytes
SHA-256: 5f3f94dbcd624c8699f854193d4c1c5f42409508774706a72fa91b7c87b2a597
font_02_sfnt_off00007e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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