Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a87f13e9c8fb757…

MALICIOUS

PDF

72.4 KB Created: 2020-08-17 01:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87ab00b7bbe89a37ab311539d1cb2bba SHA-1: 52085aebab5f3b73064c288ddcc15bd86c2f0303 SHA-256: 7a87f13e9c8fb757a0f756f10009cd557f667735bd98fef1c34933f11c56c7fa
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link that redirects to a known malicious infrastructure, disguised as an Adobe Creative Cloud update error. The document also instructs the user to disable security software, which is a strong indicator of malicious intent. The presence of a link farm and a call-to-action button further supports a phishing or social engineering attack pattern.

Heuristics 5

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=adobe+creative+cloud+update+failed++error
    • http://files.miriamruberlartist.com/uploads/1/3/1/4/131483019/828517e6fc26dc2.pdf
    • http://files.williamsomerville.com/uploads/1/3/0/7/130738928/9804823.pdf
    • http://detapa.oaktonridgehoa.org/uploads/1/3/0/7/130775258/22f7e.pdf
    • http://baxar.hofer1.com/uploads/1/3/1/4/131453574/1523262.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/prot_warrior_bis.pdf
    • https://cdn.shopify.com/s/files/1/0433/7795/0870/files/samsung_g532g_cf_auto_root_file.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/juwajo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4335/4781/files/zanajojumir.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/wunol.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/vevele.pdf
    • https://cdn.shopify.com/s/files/1/0440/8868/8790/files/sunef.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/lurizatike.pdf
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/nukowetefibezazon.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/class_browsershot._does_not_exist.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/74906040264.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_off0000deee.bin
70e1b88864d4d3a05c1da9cb5cf301be2ed638bfa46a30f700fc87506000f80e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEE 5160 bytes
font_01_sfnt_off0000f08b.bin
0664f787475f6d56facf3d7be72d313c21138bd8155402e58d0845f313dc5700
pdf-font-stream PDF embedded font (sfnt) at offset 0xF08B 10524 bytes