Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66b0823761a46f4…

MALICIOUS

PDF

42.8 KB Created: 2020-08-02 16:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bdac7712cbad718d1b83675ac6d30f8 SHA-1: 3d4de436f0e4434e3c4d6d5201982742407815f0 SHA-256: c66b0823761a46f46cb51d4dbffec04198c5a8610eba5d08dc82c0b53f1821f8
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL "https://ttraff.com/pify?keyword=net+credit+sales+formula", which is also listed as a malicious redirector. This suggests the document is designed to redirect users to malicious infrastructure, likely for phishing or malware delivery.

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.com/pify?keyword=net+credit+sales+formula
    • http://files.gracejiang.info/uploads/1/3/1/8/131856627/4945528.pdf
    • http://files.costaphotoart.com/uploads/1/3/0/7/130738823/4707382.pdf
    • http://files.bethanywelchfitness.com/uploads/1/3/0/7/130739699/noputixijuwozef_liruse_vufile_nofibejikiti.pdf
    • http://files.elginparkathletics.com/uploads/1/3/1/4/131406413/xikudenaw.pdf
    • http://files.charliecremen.com/uploads/1/3/0/8/130813373/lalulewadunovej_fewedufelebemip_weziroma_gemugo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/embed_images_in_illustrator.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72163988246.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38461358607.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89352644259.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/77273325290.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4882/files/23419479114.pdf
    • https://cdn.shopify.com/s/files/1/0431/8658/5749/files/zeredikabazilepivupup.pdf
    • https://cdn.shopify.com/s/files/1/0433/8958/3514/files/sutakobujigejetipareb.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/xudowarokidegawewetesuje.pdf
    • https://cdn.shopify.com/s/files/1/0430/9005/1221/files/bizuzuxide.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/moduzibupazokemekowi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/98917628950.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_off00006932.bin
28e7e6bbc8c91b6a27cc5a560a697c140639b4d4cb6940783ac1008e6b85f346		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6932 5136 bytes
font_01_sfnt_off00007a98.bin
0f005889d5dd1e32a8236553a98f9f888903129121a801b88bbfe2f9161245c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A98 10372 bytes

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