Malicious PDF — malware analysis report

Static analysis result for SHA-256 c50b3df43b59202e…

MALICIOUS

PDF

43.1 KB Created: 2020-08-31 22:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2c7694702c7bea9a40a72d097f3c5bb SHA-1: d051efcfa8954a893af8ab8d130e7713f74a6bbb SHA-256: c50b3df43b59202e5e43cd3d1d060b1eb5116f0526d7f3dac2674d240f10f44d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.me'. The document body, though heavily obfuscated, contains text related to 'Standard and Poor's stock guide', suggesting a lure. The presence of numerous embedded links, including the malicious one, indicates an attempt to drive traffic to potentially harmful sites.

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.me/wix?keyword=standard+and+poor%2527+s+stock+guide+pdf
    • https://cdn.shopify.com/s/files/1/0439/2668/3816/files/4753915369.pdf
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/dapuzokowoxugesagejo.pdf
    • https://cdn.shopify.com/s/files/1/0463/3205/1618/files/tedujasab.pdf
    • https://cdn.shopify.com/s/files/1/0450/3358/6838/files/republica_aristocratica_peru.pdf
    • https://cdn.shopify.com/s/files/1/0434/9735/7472/files/git_merge_last_two_commits.pdf
    • https://static.usrfiles.com/ugd/97aff7_2a96baae6550437bb2af5be7d49170fa.pdf
    • https://static.usrfiles.com/ugd/b88e3d_0f87f1035eb14756bea2b207fd05f5de.pdf
    • https://static.usrfiles.com/ugd/3ce946_9ae206a9bdc345fa9e6f4956420b80ca.pdf
    • https://static.usrfiles.com/ugd/912de2_ffc573697ab741bb919c256325fa0d07.pdf
    • https://static.usrfiles.com/ugd/6f53d7_0c0c9204fcf741679d04f07ffc6d0b4c.pdf
    • https://static.usrfiles.com/ugd/b8c837_524090b8552f42b793edbd66edf2a5db.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_off00005c0e.bin
719c459ff7573cf06321c38af52013fe7daff40c9878185757eaef91f6c601ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0E 5372 bytes
font_01_sfnt_off00006e5f.bin
2d4633b86ab10a8e39e230441010890f63185160f80d9802a0922aeb6c25d9b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5F 10348 bytes
font_02_sfnt_off000091e4.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91E4 4324 bytes

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