Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c1066f3cd794558…

MALICIOUS

PDF

41.9 KB Created: 2020-08-11 21:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5a1de4290d5b7331204b1536b935fc9 SHA-1: bdaa948739bff1ae6ad56fe171a689518288c566 SHA-256: 4c1066f3cd7945589b88ae2cd5ded5c003e3e91f7ecc730dcfc57def20e6650d
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=disadvantages+of+technology+in+business+pdf'. The document body, though partially corrupted, also contains this URL, suggesting a lure to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, indicates a potential link farm used for SEO poisoning or to obscure the true malicious destination.

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=disadvantages+of+technology+in+business+pdf
    • http://puvejolek.guadalupeblinds.com/uploads/1/3/0/7/130776031/f8bff.pdf
    • http://texabat.the100cyclingchallenge.com/uploads/1/3/2/6/132695306/jimamuladiw.pdf
    • http://linijum.azracquetball.com/uploads/1/3/1/3/131379578/df56eb64.pdf
    • https://cdn.shopify.com/s/files/1/0429/6366/5062/files/96065503615.pdf
    • https://cdn.shopify.com/s/files/1/0435/4765/6351/files/63220010495.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/84051941439.pdf
    • https://cdn.shopify.com/s/files/1/0431/1711/7589/files/lebelig.pdf
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/runowesawimelexobisug.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/46364208974.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/salary_requirements_letter.pdf
    • https://cdn.shopify.com/s/files/1/0431/9733/3664/files/88270972481.pdf
    • https://cdn.shopify.com/s/files/1/0432/0765/5579/files/lowes_hixson_tn.pdf
    • https://cdn.shopify.com/s/files/1/0429/4675/6774/files/capteur_ultrason_hc_sr04.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_off00006492.bin
e0618e0550d60e470e405075e629800c56bb8d23766c0c0f067dd840a3e6755f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6492 5624 bytes
font_01_sfnt_off000077b5.bin
a3171d21943e8ff98f6f8c35a1c3cee00acc384998ef3ad54ffd10388b3774b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B5 10168 bytes

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