Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb60b44046e9e2ee…

MALICIOUS

PDF

46.3 KB Created: 2020-08-30 16:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7516e55b5d9807bc2c6bd25323ff0962 SHA-1: 36ba46ecd26a4ec989926c5023ea435e4e8aab10 SHA-256: cb60b44046e9e2ee45458e2f5fd3cc72af077bacb0644b565ea7268c943d3d52
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, identified as a link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.ru/wix?keyword=sar+of+antifungal+drugs+pdf', is directly linked to this redirector. The document body, though heavily obfuscated, contains the same search query, suggesting a lure to a malicious site disguised as a search result. 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=sar+of+antifungal+drugs+pdf
    • https://cdn.shopify.com/s/files/1/0428/9986/5756/files/biological_warfare_agents.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4641/files/kuzupurugafi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7114/3078/files/73840039094.pdf
    • https://static.usrfiles.com/ugd/b8c837_8df052a8eff54f639f43a71e5b786c04.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f916a37441c4147a6c9d3dcfe085ef7.pdf
    • https://static.usrfiles.com/ugd/97634b_216f77a7389c4377b427c1998857f9a2.pdf
    • https://static.usrfiles.com/ugd/7f46b5_70213b0ef4ef44a5b2e1f109e47adcd3.pdf
    • https://static.usrfiles.com/ugd/39cb9d_0218918ccb834d43a3aa86ab9d73ac98.pdf
    • https://static.usrfiles.com/ugd/3649d2_98e021e6a9b849209cf4b4710251105b.pdf
    • https://static.usrfiles.com/ugd/b8c837_26c51cec3b804c8e8997b26eff76d6be.pdf
    • https://static.usrfiles.com/ugd/57c819_b5b9a395d1f14a8c95627974838f81e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc303731d6eb4686ac276f30f5750e27.pdf
    • https://cdn.shopify.com/s/files/1/0437/1247/9382/files/10684489584.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/nuzamilosebi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/metso_gyratory_crusher.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6617/files/60797190620.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/satovosegivijefesinuw.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_off0000767c.bin
f5062428a6c3d506c51b154b86222a3dca4f2a3ac5f3c14d451e7f2400bb1325		 pdf-font-stream PDF embedded font (sfnt) at offset 0x767C 5312 bytes
font_01_sfnt_off00008894.bin
bdb5b16ae914e4768a0692e57c2613d1ef3bf21f7365412e17475714b09eaa18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8894 10360 bytes

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