Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a55547d4bac36c3…

MALICIOUS

PDF

41.3 KB Created: 2020-08-31 00:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a83f635d93cc71fbb695abdd71ca924d SHA-1: fb52e4a0549fba3fe6edaa9704e36028ff991fb6 SHA-256: 1a55547d4bac36c339328716b3aa62f0a22ef5502613daf97bf047febfc1902d
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to a critical heuristic identifying it as a link farm containing a known malicious redirector. The document body, though partially corrupted, contains the malicious URL and numerous other links pointing to external PDFs, suggesting a coordinated effort to distribute malicious content. The primary malicious URL is https://ttraff.cc/wix?keyword=gri+ko%25C3%25A7+konu+listesi+2019.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=gri+ko%25C3%25A7+konu+listesi+2019
    • https://cdn.shopify.com/s/files/1/0436/1751/7731/files/vuze_for_mac_os_x_10._7.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/cnn_games_eggz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/xuwinetavoto.pdf
    • https://cdn.shopify.com/s/files/1/0435/1302/0570/files/13356433633.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/rationalism_vs_empiricism_philosophy.pdf
    • https://cdn.shopify.com/s/files/1/0438/1832/0034/files/49501043281.pdf
    • https://cdn.shopify.com/s/files/1/0433/0281/3849/files/sozurutudoxozonifujudi.pdf
    • https://static.usrfiles.com/ugd/d902bb_db950e1da0e94eb29aff4f98b1eb696d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e37f0d60dca64d2186135b4c078352fe.pdf
    • https://static.usrfiles.com/ugd/33a2e4_0d443b66659140ceb0244f674ebeec64.pdf
    • https://static.usrfiles.com/ugd/b8c837_d48471aaaa244e38b35b19d5a8e26b74.pdf
    • https://static.usrfiles.com/ugd/30e015_271304d2557e4f5da11df88cd071d1be.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a3a734cf46e429b9e3999b0607068bf.pdf
    • https://static.usrfiles.com/ugd/934fc3_6eca4c3e350149048c1df948d0c1fae3.pdf
    • https://static.usrfiles.com/ugd/b8c837_189ad59eae1f4411ac9b7abda0c0600d.pdf
    • https://static.usrfiles.com/ugd/b8c837_107ea472e23142c1ade4d378904ae83b.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_off00005f78.bin
859fd46159f51090f1cb02c1909b5111632d89194f3e823eff29e7187e7bc779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F78 5228 bytes
font_01_sfnt_off00007164.bin
154ccca7149a2beb454b6102f04ac0917c75ea9cfd45dcc719917dfefadca56d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7164 12088 bytes

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