Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf08a8bd41acecc6…

MALICIOUS

PDF

39.5 KB Created: 2020-08-12 18:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a7a3e78cc5fdc6d1e2aeed48747dffa SHA-1: 0c1c237aa6bd49978271dc56bb2cab02d086baf3 SHA-256: bf08a8bd41acecc6f8b48105041d51f7d50147ab9c81cbfc474042b4b897791e
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with the heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicating that at least one points to known malicious infrastructure. The 'PDF_SEO_LINK_FARM' heuristic further suggests a large number of external links, likely to manipulate search engine rankings or to host malicious content. The primary malicious IOC is the redirector URL. No scripts were extracted, limiting the ability to determine further payload delivery or execution methods.

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/wb?keyword=themes%20in%20information%20system%20development%20pdf
    • http://wasugog.sakivintagekimono.com/uploads/1/3/1/4/131437363/pazurasofi_nopiwixofefavi.pdf
    • http://files.radarstrongjones.com/uploads/1/3/2/6/132681080/972861.pdf
    • http://files.alpost119.org/uploads/1/3/2/7/132740399/a6dba498.pdf
    • https://cdn.shopify.com/s/files/1/0441/2263/6440/files/linkin_park_numb._mp3_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/5523/2677/files/catalogo_andrea_primavera_verano_2020.pdf
    • https://cdn.shopify.com/s/files/1/0444/1748/2919/files/nsw_school_calendar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/veridepepigibafukefuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0654/9406/files/93513769597.pdf
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/bowivazinef.pdf
    • https://cdn.shopify.com/s/files/1/0436/0051/1138/files/3213345251.pdf
    • https://cdn.shopify.com/s/files/1/0437/9967/5041/files/signs_and_symptoms_of_schistosomiasis.pdf
    • https://cdn.shopify.com/s/files/1/0447/9136/5792/files/network_marketing_pro.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/19593497464.pdf
    • https://cdn.shopify.com/s/files/1/0432/1371/7662/files/kurosuxovotizirutis.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_off00005ce2.bin
8141a2708dbb5496c41c956330eb8d3fb7e8b2bbbe4f72124d5bd60da293a99b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE2 5392 bytes
font_01_sfnt_off00006f1f.bin
96758662b245eba6c65707f5259bfbce3af3b618e1d8d9a26bd03ebd591f39ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1F 9928 bytes

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