Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca4c31aa57927476…

MALICIOUS

PDF

42.7 KB Created: 2020-09-01 19:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6687e70777771005d957dc94ebe9f3f8 SHA-1: cbb414a25afcf1641b0eaea85437ecfa7439fe55 SHA-256: ca4c31aa5792747627ce34a030f80d6fef80bfffc4b94aad51badbc3661ad0c2
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=allergic+reaction+treatment+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to benign content on cdn.shopify.com and static.usrfiles.com. The document body, though heavily obfuscated, contains the same malicious URL and references to treatment guides, suggesting a lure to disguise the malicious intent. No scripts were extracted from this sample.

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/wix?keyword=allergic+reaction+treatment+pdf
    • https://static.usrfiles.com/ugd/db1da1_7f0e2257138a4e3b8518cd043be1d315.pdf
    • https://static.usrfiles.com/ugd/590778_7040ebce771d41a1b4e9474b4676d69b.pdf
    • https://static.usrfiles.com/ugd/956c05_b738cbbf12034875a875d7d2769b0c7b.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_2abdb51e65fb4d7c803ad53354608e22.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6ded65ed64640508ddf66f5508659ab.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7068/files/49428002905.pdf
    • https://cdn.shopify.com/s/files/1/0429/1251/4201/files/bladder_cancer_treatment_guidelines_uk.pdf
    • https://cdn.shopify.com/s/files/1/0429/3433/7695/files/xofopu.pdf
    • https://cdn.shopify.com/s/files/1/0463/7717/3147/files/23923170384.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4105/files/sewifotugi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1581/2766/files/aprendendo_ingles_em.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d23.bin
1a524daeb0f2e68871deb68934cf8525f204ce963929b32edc7d600621f7bd3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D23 5072 bytes
font_01_sfnt_off00006e3c.bin
ea202b17da056dd9a9294938cd562a0b94b39d471a658c9093e058a1542dc0f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3C 9952 bytes
font_02_sfnt_off0000902c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x902C 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.