Malicious PDF — malware analysis report

Static analysis result for SHA-256 51042fcee671feeb…

MALICIOUS

PDF

45.4 KB Created: 2020-08-03 00:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7dbf2eaec2ca2de1c384745aa3a178d SHA-1: 767cbff94b782e09b77c82e1869a69b968f1d1c4 SHA-256: 51042fcee671feeb439d10af1508e9e5df336d92f7468cfe8d1e8b74b4a14935
160 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One prominent link, 'https://ttraff.com/pify?keyword=windows+10+cleanup+script', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and suggests a lure related to system maintenance. The presence of a visible LOLBin command execution instruction further supports the malicious intent, likely to download and execute a secondary payload.

Heuristics 4

  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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.com/pify?keyword=windows+10+cleanup+script
    • http://files.alanparsonsjewellery.com/uploads/1/3/1/6/131607010/puzixemi-xefini.pdf
    • http://files.norcalsmartvestorpro.com/uploads/1/3/2/7/132710655/96f0fa3.pdf
    • http://files.thesalvagesisters.net/uploads/1/3/0/7/130739986/ba82b1467.pdf
    • http://files.historydbqs.com/uploads/1/3/1/1/131163613/2df583a049.pdf
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/25577505062.pdf
    • https://cdn.shopify.com/s/files/1/0437/8548/6485/files/narufimopo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2074/files/guropetalusudenavilolulu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1869/0458/files/13300079340.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5022/files/84318951118.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8929/files/d3_patch_2._3.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/54586061259.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/zegekate.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/sumifetamo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6439/files/walowiretesekubinezena.pdf
    • https://cdn.shopify.com/s/files/1/0432/8872/3616/files/nijak.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/10179256948.pdf
    • https://cdn.shopify.com/s/files/1/0435/6128/7839/files/goldman_fristoe_test_of_articulation_2.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_off00006726.bin
0da5ba1c44801bd5d5fb9c1a7295f27c760f836a3dc4be232b47b4399847ad53
pdf-font-stream PDF embedded font (sfnt) at offset 0x6726 5368 bytes
font_01_sfnt_off00007992.bin
eb32e661649b5d694dab64aa158ce5d3b3e3edc44d4a9fa6f85bc31d801f871d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7992 14948 bytes