Malicious PDF — malware analysis report

Static analysis result for SHA-256 c034270a86a32237…

MALICIOUS

PDF

41.1 KB Created: 2020-08-03 15:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d71cfb8d69a78e0577f2fa6f1a13304 SHA-1: 6fb2980c020f8ea9cdca8fb9a4a80a15f2f2b558 SHA-256: c034270a86a32237c486e1f4e5dfe383ca869d66c728d1b94f04000e25b5bf05
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to writing a CV and includes the malicious URL, suggesting a social engineering lure. The presence of a link farm further indicates malicious intent to drive traffic to potentially harmful sites.

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=how+to+write+an+undergraduate+cv+pdf
    • http://files.oasystec.com/uploads/1/3/1/4/131408432/degotosamo_bexavolejaz.pdf
    • http://files.storywings.net/uploads/1/3/1/6/131637273/717901.pdf
    • http://files.mindwisecounsellor.com/uploads/1/3/0/7/130739463/zavarem.pdf
    • http://files.maxfloguttering.com/uploads/1/3/2/7/132740743/bokugap.pdf
    • https://cdn.shopify.com/s/files/1/0434/1393/0142/files/35541248160.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/43367444825.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdf
    • https://cdn.shopify.com/s/files/1/0427/7947/6134/files/31088553049.pdf
    • https://cdn.shopify.com/s/files/1/0435/4962/2431/files/10363101243.pdf
    • https://cdn.shopify.com/s/files/1/0439/3225/4376/files/95999639572.pdf
    • https://cdn.shopify.com/s/files/1/0428/3616/4774/files/ninil.pdf
    • https://cdn.shopify.com/s/files/1/0432/9229/5332/files/82863138986.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/boripulifemifegogimipida.pdf
    • https://cdn.shopify.com/s/files/1/0430/8140/0469/files/bonawiduw.pdf
    • https://cdn.shopify.com/s/files/1/0436/6955/3305/files/gekir.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_off000062f0.bin
c1d0d5da3859813e0f2070bd76ccb4b4f0720349b0ea399b124fc0f1abd49077		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F0 5224 bytes
font_01_sfnt_off000074e9.bin
3e18a0e0e3085bde2c3ad79ca59de0dd937d826f732c20833b5ed9ddb053f85a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E9 10180 bytes

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