Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff755e54ea4749d…

MALICIOUS

PDF

123.0 KB Created: 2020-07-09 02:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d38c7e34f7372ba1f841568069b9e17 SHA-1: 941faa142d1b6dcb8b95b4bb3ababb29a9a410de SHA-256: 9ff755e54ea4749dd42c96e934c85b2cc98dd75dde046ce62dfc940dd3459896
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/wb?keyword=tempest%20text%20pdf'. The document body contains obfuscated text and metadata related to 'wkhtmltopdf', suggesting it was programmatically generated. The presence of many SEO-like links indicates an attempt to lure users to potentially malicious sites.

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/wb?keyword=tempest%20text%20pdf
    • http://files.milescollegenationalalumni.com/uploads/1/3/1/3/131383889/labukakabavenitega.pdf
    • http://files.donnastocker.com/uploads/1/3/1/3/131380032/32a97da94ada6d.pdf
    • http://files.mjlphd.net/uploads/1/3/0/8/130813381/nopoxixibekagajik.pdf
    • http://files.teach-me-today.com/uploads/1/3/1/4/131411024/fuzux-puwisidewiran-saton.pdf
    • http://files.withlovezoerose.com/uploads/1/3/0/8/130874541/51722c8b71.pdf
    • http://files.southkeyscentrum.com/uploads/1/3/1/3/131381411/8a15575d7.pdf
    • https://dukakala.files.wordpress.com/2020/06/gotukanefojokediguxo.pdf
    • https://gozosalojuj.files.wordpress.com/2020/07/25193674215.pdf
    • https://pijetodewi.files.wordpress.com/2020/06/52251393485.pdf
    • https://vofufogufi.files.wordpress.com/2020/06/zarax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fadanamimurusekebunom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dusegu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.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_off0001adb9.bin
8169546414ab1859867e2fbc86f02308ae25f1b460d59f000664bccb44a55765		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADB9 4388 bytes
font_01_sfnt_off0001bca9.bin
6478facb9b84377ba93a96c2374f4780a3279d7b6c7946f9e8d29a7c9df3ac51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCA9 10052 bytes

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