Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d1e83afa0a30169…

MALICIOUS

PDF

47.3 KB Created: 2020-08-24 20:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3307586551b26b83f603a562abe8a86b SHA-1: db52dba7060d2b98ab2aa454e19eb7c7f26b9256 SHA-256: 8d1e83afa0a301695fa8e8232c44b5db2a018488ab6598d16e4501ce3f0cdc5f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, forming a link farm. One of these links, 'https://ttraff.ru/pify?keyword=banshee+season+3+episode+1', points to a known malicious redirector. The presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious content, likely for phishing or malware distribution.

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://ttraff.ru/pify?keyword=banshee+season+3+episode+1
    • http://files.willowfree.ca/uploads/1/3/0/7/130740344/xiwodufa.pdf
    • http://files.zoepantinjewelry.com/uploads/1/3/0/7/130775998/wozanegowoveso.pdf
    • http://files.eraofficechairs.com/uploads/1/3/0/8/130814960/favonaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/takolopijatupud.pdf
    • https://cdn.shopify.com/s/files/1/0450/6406/1078/files/tinegisidarofovonogunuji.pdf
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/zenonia_5_wizard_build_guide.pdf
    • https://cdn.shopify.com/s/files/1/0457/3639/4918/files/37480949431.pdf
    • https://cdn.shopify.com/s/files/1/0437/5861/6733/files/76489143200.pdf
    • https://cdn.shopify.com/s/files/1/0437/5032/6421/files/arquitetura_bioclimatica_tropical.pdf
    • https://cdn.shopify.com/s/files/1/0437/0140/3801/files/necron_codex_7th.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/nenigasikab.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e38.bin
5fbc538689d9f59eca83e9424667a3cdc26bf0f8bdf6da93193248e4ff1cb75f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E38 5184 bytes
font_01_sfnt_off00008fd4.bin
1fee6c447ec5f0837ad64ec0ed5b59de18a694cb5de00c12519a52a780ae888b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD4 9624 bytes

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