Malicious PDF — malware analysis report

Static analysis result for SHA-256 734248f5437c2c0c…

MALICIOUS

PDF

47.9 KB Created: 2020-07-25 23:37:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bb41edc6632ca39e7c116ca587c1177 SHA-1: cf012257e780fcf18447ce8e02d82ebec4890223 SHA-256: 734248f5437c2c0c103c83ccc465d7a2f86b018e7f24efdf6becd7db0231fccd
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious infrastructure, disguised as a download for "Blender 2.8 launch pad". The document body is heavily obfuscated, but the presence of a malicious redirector and a link farm suggests a phishing or malware distribution attempt. The file is identified as a PDF, and the heuristics indicate it's a redirector link and a link farm, pointing towards a social engineering attack.

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.cc/pify?keyword=blender+2.+8+launch+pad
    • http://files.helenebergmanviolin.com/uploads/1/3/1/3/131398091/0e0d67e4465a.pdf
    • http://files.alliancescience.com/uploads/1/3/0/8/130874055/03c4e3d9.pdf
    • http://files.blossomvalleysingers.org/uploads/1/3/1/8/131871593/2531817.pdf
    • http://files.tvsmercantile.com/uploads/1/3/2/6/132682826/3168994.pdf
    • http://files.blossomvalleysingers.org/uploads/1/3/1/8/131871593/
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/63557756198.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3829/files/nuporajaverisunogiruzi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/lagusafovuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/wopudu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0615/6190/files/pekolivuvutobupituruxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8269/4312/files/fufovizugovakabanife.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejumaxerufu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/5636433601.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/62776035618.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/loduriwujixulaluk.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_off00007e56.bin
a58435e688215c81807436814b08d595a56b3004e2db6fa812a24c7d956bb752		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E56 5036 bytes
font_01_sfnt_off00008f5e.bin
efcdadad1b79767887120b46480b9af3b4a484e7856de7cc3151405402a3bb28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F5E 10260 bytes

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