Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ef3faba6cc67c01…

MALICIOUS

PDF

44.6 KB Created: 2020-07-08 23:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 876695bca1943142b196f5489e40e196 SHA-1: 4089f74d324edd54a0565af859d9558e7f2c3da8 SHA-256: 8ef3faba6cc67c01b6f9aa727c221e3eea814cfbf9b351cf5605d2a0f80f996e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm, designed to redirect users to external websites. One of the primary links, 'https://ttraff.ru/wb?keyword=soft%20pastel%20techniques%20worksheet', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains similar URLs, reinforcing the malicious intent of directing users to potentially harmful content.

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=soft%20pastel%20techniques%20worksheet
    • http://files.creekcitygraphics.com/uploads/1/3/1/3/131380953/xakumi_reluwate_mokapufox.pdf
    • http://files.savebozeman.org/uploads/1/3/1/4/131408529/80336d.pdf
    • http://files.quantumpoint.org/uploads/1/3/0/8/130874031/fexurugomaseba_livorejalolokib_kuluvewowa.pdf
    • http://files.facesdayspa.com/uploads/1/3/1/8/131871762/rovolozotewer-vufeg-guvagejupekele-pobuvopis.pdf
    • http://files.luisaluisa.com/uploads/1/3/1/3/131398133/5525725.pdf
    • http://files.afmsupplements.com/uploads/1/3/2/3/132302815/972851.pdf
    • http://files.royalmarineser.com/uploads/1/3/1/0/131070911/8239271.pdf
    • http://files.stspain.com/uploads/1/3/0/7/130776575/7eb48.pdf
    • http://files.kirstencole.com/uploads/1/3/0/7/130776481/temeliribeki.pdf
    • https://pegubup.files.wordpress.com/2020/06/zikusagojar.pdf
    • https://kizutakogoz.files.wordpress.com/2020/07/modupuvuwo.pdf
    • https://gefijapowiv.files.wordpress.com/2020/07/69900746860.pdf
    • https://sexepik.files.wordpress.com/2020/07/rekesom.pdf
    • https://tigizenawa.files.wordpress.com/2020/06/51739183883.pdf
    • https://vujatuzine.files.wordpress.com/2020/06/11719023257.pdf
    • https://jubasejoxes.files.wordpress.com/2020/07/gemisokaleneposuxogiwir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49893706483.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42539854631.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48975286879.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/meragavafeduxilaxopuxaw.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/
    • https://cdn.shopify.com/s/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000708c.bin
0c10f12cea6fd01b70d77065489006944803513e6dbfb82866beda9e56f025f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x708C 5372 bytes
font_01_sfnt_off000082d1.bin
23254142d0f6be02609e831941a13e66dcb2abd357cd39f2cd7ea1fb72c4b96b
pdf-font-stream PDF embedded font (sfnt) at offset 0x82D1 10088 bytes