Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed1bce5355fdcd7…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 09:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c97be5174a259f8289218200fe9086c SHA-1: 8efa947831d333a06ec33c12182e20eff675d53c SHA-256: 1ed1bce5355fdcd76132fadcfdc32f68933dce7a765d2982feb38e5062b703c5
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'Op bounty rush mod apk', suggesting a lure for potentially pirated software. The presence of numerous SEO-optimized PDF links further supports the attack pattern of a link farm designed to drive traffic to malicious sites.

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=op+bounty+rush+mod+apk
    • https://cdn.shopify.com/s/files/1/0440/0028/0726/files/sura_ar_rahman_bangla_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/voxuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fupibi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0505/0008/files/goldman_sachs_blockchain_2020.pdf
    • https://static.usrfiles.com/ugd/4c1554_0dbb79cd321449d29fd9d65d0ddcd38b.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2bc83b541424a16a5283b75bd9271d1.pdf
    • https://static.usrfiles.com/ugd/30e015_4507369968784f9e888dd3628232dbdc.pdf
    • https://static.usrfiles.com/ugd/b5aed9_d6ef10628a604631b984d8156d1fb5fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_271090167dc04bebafb0337794bf4f64.pdf
    • https://static.usrfiles.com/ugd/b8c837_03469f8f1a1c4133900d943862dac300.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_50e761a2fb78400cb756e7a5482e88ab.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_off00006422.bin
f20d5b95ae4aacd32ee5ff0bb8fa37053cd10d0267f3ed34d012d721d95c5d27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6422 5500 bytes
font_01_sfnt_off000076a0.bin
5e9413005998716549ffd485c84a3ab4962aed414666f8ca541466b52c60fe07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A0 10624 bytes

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