Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea92de7e95f24bec…

MALICIOUS

PDF

36.9 KB Created: 2020-08-03 06:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ca09c5c8e597e83eb062253bdc1eebe SHA-1: f77555200637fc8bfc7d8e02fc35d576d6e29b98 SHA-256: ea92de7e95f24bec8c61f91a599cdf8354a1160938920088827220b5e025ee85
120 Risk Score

Malware Insights

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

The PDF document contains numerous links, masquerading as a solutions manual to entice users to click. The primary link, 'https://ttraff.ru/pify?keyword=organic+chemistry+klein+2nd+edition+solutions+manual', is identified as a malicious redirector. The document also exhibits characteristics of a link farm, with many embedded URLs pointing to PDF files hosted on various domains, including multiple Shopify subdomains. 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=organic+chemistry+klein+2nd+edition+solutions+manual
    • http://files.sleepytimelab.com/uploads/1/3/1/0/131069812/e44400847.pdf
    • http://files.mtshireandsales.com/uploads/1/3/0/9/130969800/fikosutugufaj.pdf
    • http://files.grendylbayn.com/uploads/1/3/2/7/132710601/bemexugulu-fasoxojijavosek-nekerav-batuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/4062/1222/files/67729268303.pdf
    • https://cdn.shopify.com/s/files/1/0428/8777/4367/files/pusera.pdf
    • https://cdn.shopify.com/s/files/1/0440/9376/7832/files/52566913106.pdf
    • https://cdn.shopify.com/s/files/1/0437/8938/5885/files/rodaji.pdf
    • https://cdn.shopify.com/s/files/1/0433/9764/4449/files/15122452448.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/bonataworudopufinu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/15080425001.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8658/files/old_school_bond_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0434/1635/4978/files/multivariable_mathematics_shifrin.pdf
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/61885556832.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/jijarixelotowozetejiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/0427/1524/files/filokobon.pdf
    • https://cdn.shopify.com/s/files/1/0431/5620/9819/files/86969231264.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_off00004540.bin
0c351b3c3756d13cd632e0a60358c98774cecfccd7f77d5cd923643efc0e95b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4540 5560 bytes
font_01_sfnt_off000057f9.bin
6e51e3c1b1781f3f718aa7659d7aaab38ccbf2a4e59326bc12fff2644151f6a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x57F9 9388 bytes
font_02_sfnt_off0000780c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x780C 4324 bytes