Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69c44d9141f94ed…

MALICIOUS

PDF

41.8 KB Created: 2020-08-12 22:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94234f4f60c25b9b10670c811441dbc8 SHA-1: e598e458d8f8644fc381f328bc1f21d38fe83b32 SHA-256: d69c44d9141f94edab141b26a6fc5e839c18f460016fd8fc6732d97dfbc072e9
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is embedded within the document body, disguised as a search query for 'national geographic learning english pre intermediate pdf'. The presence of numerous other links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious destination. The primary malicious URL is the most critical IOC.

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=national+geographic+learning+english+pre+intermediate+pdf
    • http://files.goepfertspeechassociates.com/uploads/1/3/2/6/132681976/tipowefopagoz-tulodalonar.pdf
    • http://files.fultonfalcons.com/uploads/1/3/0/7/130740213/ed1c55.pdf
    • http://files.impactarcheryclovis.com/uploads/1/3/1/4/131483266/9934640.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1703/files/kerodememedawasepuwod.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/8785445082.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/pesetimokomidik.pdf
    • https://cdn.shopify.com/s/files/1/0430/7763/2154/files/pegogilaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7341/files/98905153205.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3259/files/wowejazajezos.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5265/files/84363613919.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/97573327583.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/anatomical_nomenclature.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9759/files/padazipenun.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/59118104966.pdf
    • https://cdn.shopify.com/s/files/1/0434/2333/4567/files/84058453949.pdf
    • https://cdn.shopify.com/s/files/1/0435/1285/6731/files/57323911191.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nefodegaxinavikiva.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_off000062ab.bin
2e298ad1c95c78c6aa31c4e9a3b14951b6721738f72691485f0badb288df4b85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62AB 5536 bytes
font_01_sfnt_off00007553.bin
7faf03cb285fee2349537a2802a918fcaad4c53b2055420770a499bec587161a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7553 10768 bytes

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