Malicious PDF — malware analysis report

Static analysis result for SHA-256 9160c0fc4c90e718…

MALICIOUS

PDF

35.2 KB Created: 2020-08-17 03:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b1433cb788b6a7a1d714ac4c4a9e80f SHA-1: ab4e6abd71f5b3ad6edc3260d0b5145953c81850 SHA-256: 9160c0fc4c90e718947e8162e3e290e5b2b68f579524f458bba392197b327e34
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=agma.+io+hack', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of numerous shopify.com links appears to be a tactic to obscure 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.ru/pify?keyword=agma.+io+hack
    • http://ruzal.kinnakeetclay.com/uploads/1/3/2/7/132710621/xisajesab-wofurezef.pdf
    • http://zikofo.eating2heal.com/uploads/1/3/1/4/131453536/zerofonuvefexe_digokejifomivex_jivenijabowu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9531/7911/files/57133347480.pdf
    • https://cdn.shopify.com/s/files/1/0433/2034/4731/files/18706847608.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/fewewedebosimepolifamis.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5970/files/1404240487.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/44523319952.pdf
    • https://cdn.shopify.com/s/files/1/0432/0054/4931/files/jarunepupab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugerivedisabuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1029/files/49868657818.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5400/files/nobefusivusogoka.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_off00004b7f.bin
577dfee7268fc249380e150bb83b20f1b61ee6c01c2b6695d0de6ebf28fcb27c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B7F 4992 bytes
font_01_sfnt_off00005c61.bin
adceb9711e1ee2e422155ae4ebd3c954628b0f41dde2ff6d5a7a2f2efd159f1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C61 11116 bytes

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