Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97a09506d277863…

MALICIOUS

PDF

49.6 KB Created: 2020-08-31 00:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4f0eb864fcc879e9996e734eee20822 SHA-1: 6ab6f5aed0717e1b81120b803a0c1b383ebf22f4 SHA-256: c97a09506d27786325fb2eb96bfff31dbb05005c22acf2137cf8aad7ca203a5b
150 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, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=sims+3+1.67.2+crack', is designed to lure users into downloading cracked software. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, one of which is 'https://static.usrfiles.com/ugd/b8c837_7fa446c470eb4569818538220fc8a54d.pdf'. The ML classifier strongly supports the malicious verdict.

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=sims+3+1.67.2+crack
    • https://static.usrfiles.com/ugd/b8c837_7fa446c470eb4569818538220fc8a54d.pdf
    • https://static.usrfiles.com/ugd/b8c837_73d44f7e83164624909aa3b40919c01f.pdf
    • https://static.usrfiles.com/ugd/bf650e_d1b5ccb35d0447129db681d1da1da5e9.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/maths_formulas_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3137/files/farming_simulator_14_tips_ios.pdf
    • https://cdn.shopify.com/s/files/1/0450/3057/2190/files/12th_science_biology_book_in_gujarati_sem_4_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/57161279273.pdf
    • https://cdn.shopify.com/s/files/1/0433/2489/9496/files/89128059273.pdf
    • https://static.usrfiles.com/ugd/0adedf_32565a4df7694920836c869bb3ab6145.pdf
    • https://static.usrfiles.com/ugd/2813e2_e33e51889d894d7eb16fdc259895c4f4.pdf
    • https://static.usrfiles.com/ugd/451461_88bb32f1b252488395cef1bee3cf2adf.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006109.bin
21fa40ce82ca6bd233e5fd8dea378baae835532548e6bf5721bd72b4641963b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6109 5696 bytes
font_01_sfnt_off00007449.bin
c4ebf9374f183e0d06abff076368f9778f5420368af1f3cb29c6cd45b472c97f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7449 1892 bytes
font_02_sfnt_off00007d69.bin
eb639faa2da7845039f7fd4ad3e5f24f3e29d44c913261e8d2839b3c285cb15a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D69 10844 bytes
font_03_sfnt_off0000a21c.bin
ebd346b4779c6df69e878d915148939e59decf0cc3c6efff3fc525330dffcb89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA21C 16384 bytes

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