Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d097f8e2ceb977…

MALICIOUS

PDF

53.5 KB Created: 2020-07-08 16:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c9f30018e586925ac767e1ff898815e SHA-1: 58252c7a3642a7b9ed7e024c41f948acccbfbf0f SHA-256: c5d097f8e2ceb977b7259e9c70b6459fc4febd8f9c7cc0fc767bea8b3c913d0f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to suspicious domains. One critical heuristic firing indicates a malicious redirector link, and another identifies a PDF link farm. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wb?keyword=sulfasalazyna%20reumatologia%20pdf', suggesting a lure related to medical information. The primary intent appears to be directing users to malicious or potentially unwanted websites.

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.cc/wb?keyword=sulfasalazyna%20reumatologia%20pdf
    • http://files.ubaehawaii.com/uploads/1/3/2/6/132696263/b88cba336e391ec.pdf
    • http://files.tacosmog.com/uploads/1/3/0/7/130739375/zebawibosabadowewat.pdf
    • http://files.rsvpvolunteercaregivers.org/uploads/1/3/2/6/132681824/navate.pdf
    • http://files.sproutsmyanmar.com/uploads/1/3/2/3/132302863/giburapudiga-dojowul.pdf
    • http://files.thermotrix.com/uploads/1/3/1/4/131407734/12612e9.pdf
    • http://files.uspaeast.com/uploads/1/3/0/8/130873895/05756bc14bb29c0.pdf
    • https://gifedejati.files.wordpress.com/2020/06/77985180136.pdf
    • https://jurikebigox883042776.files.wordpress.com/2020/06/kuwibuwozafede.pdf
    • https://wazipugakor.files.wordpress.com/2020/06/78773402311.pdf
    • https://pofajopefu.files.wordpress.com/2020/07/19763795817.pdf
    • https://wujixose.files.wordpress.com/2020/06/rokefuj.pdf
    • https://datugonirir.files.wordpress.com/2020/06/70266166771.pdf
    • https://dojuzemis.files.wordpress.com/2020/06/86553152166.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fezusagofetivori.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nojigepinipefonumupitos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75901524911.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_off00008fab.bin
75140588ae495233e9491e4f053253feb7579219ac83403c1472ab467fd5a06b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAB 5500 bytes
font_01_sfnt_off0000a24e.bin
d6a9b21b9c12e4533089d079ad81ade78570e0b318e8f506ef3bfb74f9d68607
pdf-font-stream PDF embedded font (sfnt) at offset 0xA24E 11292 bytes