Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc9a29a3dc9527b9…

MALICIOUS

PDF

41.3 KB Created: 2020-08-24 20:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 549be9a7444452113e78062f52cc2227 SHA-1: 8dc7cf60e2103223b46173a326d4541c03555527 SHA-256: dc9a29a3dc9527b99c99aba27fc957f774cb61495758e3926e8431da927446c0
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious websites. The document body, though heavily obfuscated, contains references to financial terms and the redirector URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and clicks. The primary attack vector is likely social engineering via a deceptive link within the PDF.

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=expenses+on+income+statement+or+balance+sheet
    • http://files.serenitycounseling-wellness.com/uploads/1/3/0/8/130874329/minebaluxuj-berixamis-weturiw.pdf
    • http://files.loblowsports.com/uploads/1/3/2/6/132681885/31de8.pdf
    • http://fover.sarahssensationalsweets.co.uk/uploads/1/3/0/7/130775350/2102572.pdf
    • https://cdn.shopify.com/s/files/1/0440/4084/7510/files/vernon_spelling_test.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7467/files/nawukibamukojuresivigum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rerotapok.pdf
    • https://cdn.shopify.com/s/files/1/0435/0250/2054/files/c_read_json_file.pdf
    • https://cdn.shopify.com/s/files/1/0440/6758/6213/files/materi_akuntansi_keuangan_kelas_xi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7447/6440/files/11921336035.pdf
    • https://cdn.shopify.com/s/files/1/0440/0391/7974/files/zuxolorujudosonemolukol.pdf
    • https://cdn.shopify.com/s/files/1/0429/8070/4405/files/fotafigizo.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_off000062c7.bin
bc194e0bde7df7c0421ff30bbe4bfef6445f45c80d0e3e7aa407d37fcd567569		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C7 5340 bytes
font_01_sfnt_off000074c2.bin
23f72a6fabb4b1e18c7cca0201a328167431fc2676787a9be2a1e3323b288aa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C2 10388 bytes

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