Malicious PDF — malware analysis report

Static analysis result for SHA-256 b846a1a6d4e61534…

MALICIOUS

PDF

48.4 KB Created: 2020-08-18 14:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6eb28eaef24bc44ce945058a07b2c302 SHA-1: 0dc22cfa69b1b3f37a3e11e96fc231e2e686c1cb SHA-256: b846a1a6d4e61534aa7cfe5c512791fae707c5c3fb4763e97f65d1b5172110f3
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.ru/pify?keyword=binocular+vision+ppt, is identified as a malicious redirector. The document body text, though heavily obfuscated, contains this same URL, suggesting the primary purpose is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

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.ru/pify?keyword=binocular+vision+ppt
    • http://files.churchhillproductions.com/uploads/1/3/1/1/131163953/0ea7e7141b0.pdf
    • http://suralixu.ackwoven.com/uploads/1/3/0/7/130776257/puluton.pdf
    • http://files.tambourunite.com/uploads/1/3/2/6/132682142/7345520.pdf
    • http://files.superiormachineandfab.com/uploads/1/3/2/8/132815154/5810631.pdf
    • https://cdn.shopify.com/s/files/1/0449/7945/4111/files/capacitive_soil_moisture_sensor.pdf
    • https://cdn.shopify.com/s/files/1/0432/9806/2501/files/41998094455.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/nobabone.pdf
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/64309572704.pdf
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/79660269754.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/benivat.pdf
    • https://cdn.shopify.com/s/files/1/0428/6211/7020/files/analog_signal_processing_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1142/files/40275947456.pdf
    • https://cdn.shopify.com/s/files/1/0440/4396/0485/files/antenna_theory_analysis_and_design_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/50414452893.pdf
    • https://cdn.shopify.com/s/files/1/0431/6017/4754/files/30209347723.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_off000073e3.bin
49b8011471b6e50d40f637539c95097abc9dcb37cdd332f6e57d247c1fcb5f69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E3 4800 bytes
font_01_sfnt_off00008438.bin
3a18cfdfed59231b44ae724a86858c7e9209d849721ec6668d2fdc08f376581d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8438 10388 bytes
font_02_sfnt_off0000a6cd.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6CD 4324 bytes

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