Malicious PDF — malware analysis report

Static analysis result for SHA-256 2732e86d0ade6e6b…

MALICIOUS

PDF

41.9 KB Created: 2020-08-24 16:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebfd8e51d0065b2272c404c5b9d7fc9d SHA-1: e79a5e94f541dd98f188d81a0bae33e1f9867b25 SHA-256: 2732e86d0ade6e6b6b4092c8461a7d8e0393d54583b47ae559f29f202a218bdd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to appear as a report, but the primary link redirects to malicious infrastructure. The ML classifier strongly indicated maliciousness. The document body contains the primary malicious URL and numerous other links hosted on Shopify, likely part of a link farm to improve SEO for 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://ttraff.com/pify?keyword=clash+of+champions+grades+bleacher+report
    • http://files.solutionsforenergy.co.uk/uploads/1/3/1/4/131438583/3011067.pdf
    • https://cdn.shopify.com/s/files/1/0429/7385/5903/files/watilokes.pdf
    • https://cdn.shopify.com/s/files/1/0463/1196/4829/files/14867698688.pdf
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/21059090894.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/zejafa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9504/files/takibiwofenuvobiwi.pdf
    • https://cdn.shopify.com/s/files/1/0440/7646/6328/files/41196714475.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6165/files/nazi_uniform_badges_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/siziximazi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8280/0542/files/kinuxorelabixen.pdf
    • https://cdn.shopify.com/s/files/1/0434/8257/9110/files/wugokezatidafelijobejano.pdf
    • https://cdn.shopify.com/s/files/1/0437/8584/6933/files/74402129315.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_off0000658c.bin
4e734ad2a10d81d19e44df6a4b7832c61ba34ac5aa6d5983743d13aca4381097		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658C 5612 bytes
font_01_sfnt_off00007877.bin
efa87394587a4f60c710905c529c955c01130217a8d204feccb6d361c0e6b9ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7877 10124 bytes

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