Malicious PDF — malware analysis report

Static analysis result for SHA-256 a21859488948b58d…

MALICIOUS

PDF

35.0 KB Created: 2020-08-28 01:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 764d54c6fa0d99df766c2a83eaa9c8c6 SHA-1: d4e547b6c9d82307b88f13e87b60e0522f2fcc9c SHA-256: a21859488948b58d13834ab2187b2e644edb6e51ca1ae759df2262362a624e1c
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to manipulate search engine results or direct users to malicious content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=google+spor+kolej+futbol, which is likely used to obscure the final destination of the 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.ru/pify?keyword=google+spor+kolej+futbol
    • http://files.vancepta.com/uploads/1/3/1/8/131872021/236b64e.pdf
    • http://todup.english.coach-michael.com/uploads/1/3/0/8/130814328/vunuxoguvaw_piwiruzubiwil_pawibaw_bovavoxuro.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0273/files/32259811865.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4562/files/siambit_invite_2019.pdf
    • https://cdn.shopify.com/s/files/1/0429/1769/1559/files/69198628000.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6845/files/parexoruzomazuno.pdf
    • https://cdn.shopify.com/s/files/1/0437/2017/9864/files/9586269472.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/quarterly_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/zejekusufafin.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/21456690924.pdf
    • https://cdn.shopify.com/s/files/1/0431/7554/2950/files/98209729774.pdf
    • https://cdn.shopify.com/s/files/1/0432/3278/8648/files/zuwakevimusu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9106/4987/files/72959384857.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94229011204.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_off000049e0.bin
f9dbbe5cb71369de97aab8821bcc04fba3155708577450fe3691c904206cb01a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49E0 5168 bytes
font_01_sfnt_off00005b9f.bin
0046d4f8307dcbbe0d17f283a423b431eb647e5650c9d6822efb0c011456f63d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9F 11052 bytes

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