Malicious PDF — malware analysis report

Static analysis result for SHA-256 2036471c5f7edf1f…

MALICIOUS

PDF

54.0 KB Created: 2020-07-31 11:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0995e47478bb8da1abfdba91fe3080a SHA-1: e555f66017a8ac58d36ccf043c0da24c7449fd16 SHA-256: 2036471c5f7edf1f76741777cc2fed14e6ecf61542f50d7e0ef2c1bb44b3a07b
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at 'ttraff.ru'. This redirector is used in conjunction with a SEO link farm strategy, aiming to drive traffic to potentially malicious content. The document body, though heavily obfuscated, contains keywords related to the embedded URL, suggesting a lure for users searching for specific documents.

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.ru/pify?keyword=seventh+day+adventist+28+fundamental+beliefs+pdf
    • http://files.upcyclemom.net/uploads/1/3/0/9/130969354/kiwebuxesudawe_fisenanitezota.pdf
    • http://files.samanthaldoyle.com/uploads/1/3/0/7/130776847/refubas.pdf
    • http://files.ruralnevadanews.com/uploads/1/3/2/7/132710780/d787f98c.pdf
    • https://cdn.shopify.com/s/files/1/0433/7270/7990/files/laruwenasu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5781/4421/files/61687063322.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/39838714743.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7802/files/sipopafokexalabedosi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3399/files/dowagadebidivisum.pdf
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/kewanemepotuboramimubeli.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/wonijixam.pdf
    • https://cdn.shopify.com/s/files/1/0434/2962/6017/files/29724364681.pdf
    • https://cdn.shopify.com/s/files/1/0430/2284/4067/files/36605500535.pdf
    • https://cdn.shopify.com/s/files/1/0437/8850/1143/files/dudojugajowufe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/zexupiwamutidagos.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/melavaxurewij.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4840/files/vovipe.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_off00009462.bin
d19c7bfbe4ca2b47b1d9e6bc42ed5a9f928c3bc3f7be887920b8a59889d4594e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9462 5688 bytes
font_01_sfnt_off0000a78c.bin
06c7081e0265bee0e26b4d992e4b203ba11badd653313d77f5cbc1e8febdbc94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA78C 10124 bytes

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