Malicious PDF — malware analysis report

Static analysis result for SHA-256 8df46fae259d1576…

MALICIOUS

PDF

41.0 KB Created: 2020-08-23 16:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b347d0062199724706eaf2d77071f91 SHA-1: 3f001fb50e1f90e19d193137887b57897f8150a4 SHA-256: 8df46fae259d157638298bba209007496ed1a11531ba5f9055e361133dc50b64
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=pro+forma+financial+statements+example', is designed to redirect users to malicious infrastructure. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=pro+forma+financial+statements+example
    • http://gazapidu.udderlygorgeous.com/uploads/1/3/0/9/130969723/8278353.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63491738983.pdf
    • https://cdn.shopify.com/s/files/1/0431/4172/6370/files/31115354740.pdf
    • https://cdn.shopify.com/s/files/1/0436/1610/8701/files/6052144934.pdf
    • https://cdn.shopify.com/s/files/1/0437/2991/1957/files/java_authentication_and_authorization_service.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1845/files/59605078276.pdf
    • https://cdn.shopify.com/s/files/1/0431/4847/6570/files/xibafoporugataw.pdf
    • https://cdn.shopify.com/s/files/1/0434/7835/2022/files/95848504516.pdf
    • https://cdn.shopify.com/s/files/1/0433/7244/5846/files/words_formed_using_bowel.pdf
    • https://cdn.shopify.com/s/files/1/0435/9038/5823/files/wekerakidavenap.pdf
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/harbor_freight_tig_welder.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/88897655219.pdf
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/xufaxotoridefuxekizigig.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/44183052515.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_off0000639c.bin
6699dda6f385eb0142a1735293450ea65f2bd8de49e4e02ffa2435cd82344764		 pdf-font-stream PDF embedded font (sfnt) at offset 0x639C 5228 bytes
font_01_sfnt_off0000754d.bin
65f12b88c703a11826f880f06f532fc58f3c15ab1b695ed797ad0128fa634e5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x754D 9980 bytes

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