Malicious PDF — malware analysis report

Static analysis result for SHA-256 51076221de104b5c…

MALICIOUS

PDF

43.0 KB Created: 2020-08-31 23:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9856684787eb557e8de46aeaec439ad3 SHA-1: 6ce268b9a6253efe812061f329c3ba5caf139311 SHA-256: 51076221de104b5ca8f77f40e413a3ece6a5b7d85fbee902db569397a89d4018
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this PDF is designed as a link farm, likely to distribute further malicious content or phish for information. The primary malicious URL identified is https://ttraff.cc/pify?keyword=tomb+of+annihilation+book+pdf.

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/pify?keyword=tomb+of+annihilation+book+pdf
    • https://cdn.shopify.com/s/files/1/0431/5879/8492/files/59175821369.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/vidmate_hd_er_old_version.pdf
    • https://cdn.shopify.com/s/files/1/0463/3372/2785/files/alexandro_querevalu_blue_sky.pdf
    • https://static.usrfiles.com/ugd/7198c1_1dd867ff13c84a33a19c8ca531353526.pdf
    • https://static.usrfiles.com/ugd/0adedf_25705821f6b84e269b434041e2715b60.pdf
    • https://static.usrfiles.com/ugd/b56239_0035944e276145d4affee6a740373e1e.pdf
    • https://static.usrfiles.com/ugd/09c3c7_bfe9caae35834bde83afb66f73ce4983.pdf
    • https://static.usrfiles.com/ugd/67e251_d4a8c8725c61469b8cf340358a241883.pdf
    • https://static.usrfiles.com/ugd/b8c837_55bf3f6d318a4a059be0e1e5e90bd68c.pdf
    • https://static.usrfiles.com/ugd/b8c837_51e18f378204404bb747b8fc34048345.pdf
    • https://static.usrfiles.com/ugd/b7ed05_4fea6963df154ea4ac46b9520b66a7c5.pdf
    • https://static.usrfiles.com/ugd/6260fe_33646114b40745cfbfe7f3c67fd18575.pdf
    • https://static.usrfiles.com/ugd/1be480_ea72ffcda4244de0b6c55428a488c255.pdf
    • https://static.usrfiles.com/ugd/856cea_e47d6273cb1f47478497b33bc6be1899.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_off000069e4.bin
c52ccb46969964ac5f81470eb68e5f7476fc64c10bec5f1cb5cf44c1a2621486		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E4 5160 bytes
font_01_sfnt_off00007b48.bin
e2c3162c272304660e2664dfd4b4bd7f02bea528c2b6189401b28b9bdfb0d33e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B48 10460 bytes

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