Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca4a566214974b2f…

MALICIOUS

PDF

44.2 KB Created: 2020-08-21 15:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 535ca509d410b12052d4045705ac5ca0 SHA-1: d5a36751664bed315a15a0e53fbd78471364efd9 SHA-256: ca4a566214974b2f67f976b4096ff30922f318c045386a016059f175cf0073bc
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=best+formal+dress+shops+adelaide'. Another heuristic flagged the PDF as containing a mass external PDF link farm, with the first URL pointing to 'https://cdn.shopify.com/s/files/1/0432/8554/5124/files/gevop.pdf'. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent.

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.com/pify?keyword=best+formal+dress+shops+adelaide
    • http://files.oursaviorelc.com/uploads/1/3/1/4/131437229/9840759.pdf
    • http://files.southaiken.org/uploads/1/3/1/3/131379014/9299323.pdf
    • http://files.azerothmillionaire.com/uploads/1/3/0/9/130969545/8890185.pdf
    • https://cdn.shopify.com/s/files/1/0432/8554/5124/files/gevop.pdf
    • https://cdn.shopify.com/s/files/1/0431/6433/6290/files/woxeparu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/33326655202.pdf
    • https://cdn.shopify.com/s/files/1/0432/7840/1700/files/beginner_headway_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/5550/4794/files/lubiwetanewidusezuteluzag.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6376/files/83540590987.pdf
    • https://cdn.shopify.com/s/files/1/0437/5547/1002/files/73180387888.pdf
    • https://cdn.shopify.com/s/files/1/0448/6758/4162/files/59354792680.pdf
    • https://cdn.shopify.com/s/files/1/0438/3634/2434/files/33407624817.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061ef.bin
aa93a4613947f34b214348193b3da3e2e2603a45d1850808f93bacb089582fa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61EF 5012 bytes
font_01_sfnt_off000072f3.bin
b454f498a74cd6b7788c28c205d1dee18377bb79dbcdc44811a877546f4ad633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F3 10260 bytes
font_02_sfnt_off0000960e.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x960E 4324 bytes

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