Malicious PDF — malware analysis report

Static analysis result for SHA-256 32748917cfc80ee6…

MALICIOUS

PDF

39.7 KB Created: 2020-08-16 02:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bc38775f93bc1215e9739c3e23f692a SHA-1: da74367571a853707d1df20901f4c487f6bab208 SHA-256: 32748917cfc80ee69202e33cb6d0c8e26b8de3ab06d9d1c114abef7287bdd4c5
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, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link, and another identifies a PDF link farm. The document body contains text that appears to be a title and metadata, along with a URL that is also present in the heuristics. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious 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=accp%20dvt%20guidelines%202016%20pdf
    • http://files.maths180.com/uploads/1/3/2/7/132741149/cb1817c769c0049.pdf
    • http://files.myceca.ca/uploads/1/3/1/4/131407882/3152607f284c.pdf
    • http://files.dogtrainingbyhaywood.net/uploads/1/3/2/7/132740498/6571843.pdf
    • http://nikorol.dawnwilcox.com/uploads/1/3/0/7/130775257/dusig.pdf
    • https://cdn.shopify.com/s/files/1/0437/8234/0770/files/benazoxoziwunazob.pdf
    • https://cdn.shopify.com/s/files/1/0432/3193/6674/files/vazowaxununokedileroxif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78549170372.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/slavery_in_american_literature.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4087/files/51101811488.pdf
    • https://cdn.shopify.com/s/files/1/0428/6690/1148/files/46379640527.pdf
    • https://cdn.shopify.com/s/files/1/0431/2124/6359/files/mifuwirixafemala.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/minecraft_failed_to_login_invalid_session.pdf
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/tuzevanixe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5652/8541/files/tc_electronic_d_two.pdf
    • https://cdn.shopify.com/s/files/1/0436/9347/3947/files/baluwoda.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_off00005d82.bin
633f3c83ce27f66c926dba7bf5ef677e364f7c22404e7eb417d08452ad663210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D82 5548 bytes
font_01_sfnt_off00007094.bin
f6808796b0a1898426dc678777b16cd8453d387ac14f6b510f1aa1fd317497b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7094 9824 bytes

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