Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d740e3cadc11d7c…

MALICIOUS

PDF

46.0 KB Created: 2020-09-05 02:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97d45468baa86e584eb976b72fec665d SHA-1: 8c83229df345374174540fe3f4162ac9d0e24434 SHA-256: 2d740e3cadc11d7c9d82c4d62f69b425b498f4aa1690533c252ce8531d8aef16
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/wix?keyword=beyonce+formation+tour+costumes'. This URL is likely used to redirect the user to a malicious site for credential harvesting or malware delivery. The document also contains a large number of embedded links, many pointing to benign Shopify URLs, but the presence of the malicious redirector is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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.club/wix?keyword=beyonce+formation+tour+costumes
    • https://static.usrfiles.com/ugd/22bf55_fe05dd3834644c129da2f99cedee1bd5.pdf
    • https://static.usrfiles.com/ugd/b972d5_81f890fcc39a45098f4ae3a4a4e6d9a4.pdf
    • https://static.usrfiles.com/ugd/3ce946_79a24988031642d289370810d985f8ac.pdf
    • https://cdn.shopify.com/s/files/1/0430/9198/4535/files/maths_formula_booklet.pdf
    • https://cdn.shopify.com/s/files/1/0437/5596/2522/files/fitbit_charge_2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/figabinut.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/73083470610.pdf
    • https://cdn.shopify.com/s/files/1/0428/7807/5036/files/vejelo.pdf
    • https://cdn.shopify.com/s/files/1/0439/9126/9534/files/brain_teaser_worksheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0434/8618/3576/files/6469211440.pdf
    • https://static.usrfiles.com/ugd/c12414_40bb8d70275842c5b12dd8dce84a2f31.pdf
    • https://static.usrfiles.com/ugd/5de1df_99d763cedcca42d386ab521529a5a51d.pdf
    • https://static.usrfiles.com/ugd/a98ecc_cd64343250ad4d0989108190692b782d.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_off00006863.bin
a4ce1b376ee7dc94aabb556d8be4a5f2bb5938ec9bdb73f28a25d02cda1e3fef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6863 5028 bytes
font_01_sfnt_off00007965.bin
be5dc07a8aba0c5d465301103cb6a24f64642cfb694e95c5d3bc236a3412abf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7965 10456 bytes
font_02_sfnt_off00009d2b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D2B 4324 bytes

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