Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64a006f7ee9b48f…

MALICIOUS

PDF

39.0 KB Created: 2020-08-14 16:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4822de0c777248688364f5fad405f66 SHA-1: 0480ecea179d637305183423086d09268db3570c SHA-256: d64a006f7ee9b48fa6743a3bd6fa3be0c629aba34f66085857b6630a81e40f39
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to an 'Eviews guide pdf'. The presence of a PDF malicious redirector link and a PDF SEO link farm heuristic strongly indicates an attempt to drive traffic to malicious sites. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wb?keyword=eviews%20guide%20pdf
    • http://mefora.ashagarrattmakeupartistry.com/uploads/1/3/1/3/131380126/1472446.pdf
    • http://files.thecelebrationinstitute.org/uploads/1/3/1/3/131379971/6877346.pdf
    • http://files.gjsdmusic.org/uploads/1/3/2/3/132303317/9068458a.pdf
    • http://nuvokusu.brittanycaplin.com/uploads/1/3/0/8/130874431/94fa4bcbc9db3.pdf
    • https://cdn.shopify.com/s/files/1/0428/7443/7791/files/34208826228.pdf
    • https://cdn.shopify.com/s/files/1/0430/6167/4133/files/conveyor_belt_parts_description.pdf
    • https://cdn.shopify.com/s/files/1/0434/2772/5474/files/37620324354.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/81860430760.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5923/files/86734388306.pdf
    • https://cdn.shopify.com/s/files/1/0428/2934/9030/files/lavabaludutari.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/pikipudubafajela.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/siwizobudavegi.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_off00005b0f.bin
73fab4122f80bacf261141e427af1cf52d28206fff8391f862fa3044e3694467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0F 4980 bytes
font_01_sfnt_off00006c34.bin
27d8a2b0047eeaba64321b18dffe32a02b4b78651e0b184742f0411c7d2eda64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C34 10548 bytes

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