Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e4dd88ea75adc3…

MALICIOUS

PDF

44.2 KB Created: 2020-08-04 19:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e3c64c7a6c6e5aac8a4b9cce26e706a SHA-1: 18eeba32cc1d60c098775c7fb97594545c8aa3a4 SHA-256: 23e4dd88ea75adc3e88d22f2678cecc9295f626467923f0001a39167fae124e7
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This indicates a phishing attempt to redirect users to malicious sites, likely for further exploitation or malware delivery.

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.com/pify?keyword=autodwg+dwg+to+pdf+converter+full
    • http://files.ofra-yitzhaki.com/uploads/1/3/0/9/130969754/sogebamopepek.pdf
    • http://files.journalofcounselorpractice.com/uploads/1/3/0/9/130969499/8e0e7.pdf
    • http://fogineton.edmundmichielaw.com/uploads/1/3/1/4/131482976/7ba6d5.pdf
    • http://files.meigrayselect.com/uploads/1/3/1/3/131380847/392b9aa74299630.pdf
    • https://cdn.shopify.com/s/files/1/0435/0817/0918/files/lituwomusumatepo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/8919284758.pdf
    • https://cdn.shopify.com/s/files/1/0433/9902/0696/files/68542947632.pdf
    • https://cdn.shopify.com/s/files/1/0432/6329/5646/files/31531091364.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/40274722464.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3130/files/35558725198.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/le_nouveau_code_des_collectivits_locales_en_guine.pdf
    • https://cdn.shopify.com/s/files/1/0433/2778/3080/files/sozuwozikemowipozorometux.pdf
    • https://cdn.shopify.com/s/files/1/0440/3003/4085/files/tujile.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1296/files/kojajevuzofam.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9741/files/monsters_inc_google_docs.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/lomidu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/29172176018.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_off0000618b.bin
b44a890d9671a5dd1a2773201b171ab6962f26dcc2df20691d0eb5605434f93e
pdf-font-stream PDF embedded font (sfnt) at offset 0x618B 4908 bytes
font_01_sfnt_off00007267.bin
7058e70641875acd7f5984c59ed21e49f6c647009de46f6c07c650b5a3fc033e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7267 10400 bytes
font_02_sfnt_off00009576.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x9576 4324 bytes