Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eabbeedafeb4139…

MALICIOUS

PDF

83.0 KB Created: 2020-09-05 07:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b29d97ddfd428024b661333b8514d342 SHA-1: 831c7725af2a9e5c83d43d3ad99584011679b935 SHA-256: 4eabbeedafeb41398844b5ea2cc3dc63edce961cab469a2b73f4c2c04b13c92c
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=annual+vacation+leave+letter+template'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to a malicious site under the guise of a document template. The ML classifier also strongly indicated maliciousness.

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=annual+vacation+leave+letter+template
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/69850503956.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/dubunotetabiwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/8639111981.pdf
    • https://static.usrfiles.com/ugd/b8c837_27eceed8fa744e81b2b2206a930b00ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_b107720b1cf5421ab279440d713f8153.pdf
    • https://static.usrfiles.com/ugd/b8c837_543d269272a24a689d5f9a5bbf8546a8.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/88350112607.pdf
    • https://cdn.shopify.com/s/files/1/0428/5923/3443/files/emulator_nintendo_ds_drastic.pdf
    • https://static.usrfiles.com/ugd/5af86b_13714ec48c8549fba188c16726da8619.pdf
    • https://static.usrfiles.com/ugd/516793_9cb1e79773b043439f6d386e6ee83ac5.pdf
    • https://static.usrfiles.com/ugd/f2ef67_833c52286c1a47f8b2652226110457be.pdf
    • https://static.usrfiles.com/ugd/b914b5_75ae28b8b0bc45bb9e8b1139dcdcef80.pdf
    • https://static.usrfiles.com/ugd/b8c837_7be03d8dcc7e4b7f83a3fcfee4cd176f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010043.bin
3b89a1333aa93e194de12c5c5da229a8f3a969ace6b07a90c5323b9ece6747ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10043 2828 bytes
font_01_sfnt_off00010a3e.bin
cee2edf29036d701713b9ed87cf2980367ea2ed353a48a0ad6b350b1e2f5e469		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3E 4948 bytes
font_02_sfnt_off00011b05.bin
5265d0f0313c2524b50e8649ea93e9ecdb88470f705e06bc38ea59e11dbefbc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B05 10492 bytes

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