Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a5ecff80e75715f…

MALICIOUS

PDF

55.3 KB Created: 2020-08-20 05:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c8b1c7e0d54431e1369b357b5c808e4 SHA-1: 258c25d29cb72437fde04ddb52cbb7198a22a3e1 SHA-256: 2a5ecff80e75715fa5defbeb394dfcd07d85449a43e806de296dbf9ee59a35fa
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=audiomack+playlist+er'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding a large number of external PDF links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the redirector URL and text suggesting a lure related to 'Audiomack playlist er'. The combination of these factors indicates a malicious intent to redirect users to potentially harmful content.

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=audiomack+playlist+er
    • http://files.nhsoulstudies.com/uploads/1/3/0/8/130814032/8347026.pdf
    • http://files.thespiritualcentre.net/uploads/1/3/0/7/130776267/kodixoze_rezuliravij_radesuk_kurinudibe.pdf
    • https://cdn.shopify.com/s/files/1/0437/9285/9293/files/16000324655.pdf
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/77310030573.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1085/files/science_9_module_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/56324586326.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/gelukubasesobun.pdf
    • https://cdn.shopify.com/s/files/1/0429/7116/8931/files/rufimijezi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8434/9591/files/desovatevuxuje.pdf
    • https://cdn.shopify.com/s/files/1/0462/9449/9489/files/charge_off_credit_report_does_mean.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/86563636676.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/dawoodi_bohra_calendar_1439.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/
    • https://cdn.shopify.com/s/files/1/0435/0600

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008415.bin
e51690818325492bf4df2d01cd62c10d7c6f80a62c85773a0c43ceec49f41c4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8415 5152 bytes
font_01_sfnt_off000095a7.bin
b545d34e728ef37ca77e55dba92d9f54c574bb4a25544021849731b5090cbc19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95A7 13984 bytes
font_02_sfnt_off0000c24b.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC24B 4324 bytes

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