Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9aa6a0da0e782f5…

MALICIOUS

PDF

48.9 KB Created: 2020-07-28 22:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02890001128f28e218c59538ccff2265 SHA-1: d90e928cdeb3d3f97a244fbd464d5c259fcd95fc SHA-256: b9aa6a0da0e782f5c1936a3767cea86d6c448b3d3c48c7d79b6d4f8a6695decc
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a strong likelihood of malicious intent, aiming to lure users to external sites. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the sheer volume of links suggests a distribution or phishing campaign.

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=weather+report+in+tamil+nadu+red+alert
    • http://files.rimrockmanagement.biz/uploads/1/3/1/4/131482975/zazatipu.pdf
    • http://files.crystaldull.com/uploads/1/3/2/6/132683140/kixuluju-safexetelale-noxefoxa.pdf
    • http://files.doulaplus.com/uploads/1/3/1/1/131164275/1655283.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ninitegabi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2801/3471/files/jakoxud.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7134/files/kazitolor.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/xefutebisijipati.pdf
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/pufoluzapamejaluk.pdf
    • https://cdn.shopify.com/s/files/1/0435/1374/1472/files/5070953956.pdf
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/24748803182.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2025/files/5148397784.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52209678420.pdf
    • https://cdn.shopify.com/s/files/1/0429/7244/6873/files/33626727111.pdf
    • https://cdn.shopify.com/s/files/1/0430/1648/7065/files/fuvokob.pdf
    • https://cdn.shopify.com/s/files/1/0431/6489/3344/files/zanulezelapabo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5147/3303/files/pebadugaxikovilaposilif.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/
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/pufoluzapamej

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008379.bin
bb15bb40583fc21ee8fb52b8a6f3b5a78fded654306945ef2503c1926573c4b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8379 4916 bytes
font_01_sfnt_off00009402.bin
2d2b0deedd13c80af390eff7d8d460419dbed4f3567bb1ea51ed4321078bbca8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9402 9912 bytes

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