Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a5f9e59531c89b8…

MALICIOUS

PDF

44.8 KB Created: 2020-08-04 05:29:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8adecb45b3d0591550a6a716210d0d1c SHA-1: 787a2db78a876e63ca23e2f65f62f70a9f6948e9 SHA-256: 8a5f9e59531c89b83d486b272d70125af0fb5440d410b5f0d886b05caf8f166f
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The primary heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=versos+intimos+augusto+dos+anjos+pdf`. This suggests the document's purpose is to trick users into visiting this malicious URL, likely leading to further compromise. No scripts were extracted, but the presence of numerous links points to a link farm or phishing attempt.

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/pify?keyword=versos+intimos+augusto+dos+anjos+pdf
    • http://files.malianderson.com/uploads/1/3/0/7/130739112/guroriv_xotedosom_pisudiv_dixozagujufu.pdf
    • http://files.cfandtg.com/uploads/1/3/1/4/131453657/52e2228.pdf
    • http://files.capitalareaanesthesia.com/uploads/1/3/1/8/131872079/lagefixivinol.pdf
    • https://cdn.shopify.com/s/files/1/0441/3197/5320/files/votegamavivipuwidibutiv.pdf
    • https://cdn.shopify.com/s/files/1/0436/0978/4482/files/lesala.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/balancing_redox_reactions_in_acidic_solution.pdf
    • https://cdn.shopify.com/s/files/1/0440/5896/8229/files/95982299096.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/73183534984.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5781/files/98317746876.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/77083210891.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/gakixutuvuzolo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/vefuvavibowukapo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/foxit_editor_crack.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_off000061b1.bin
af230c9f202bde095467d950abf22448fccd3a736f7812de4474a28ead2b5393		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B1 5252 bytes
font_01_sfnt_off00007379.bin
f6fe3f499ac9d87b9282c9e61cc03bdf3aed01f59663095d224046953f7d05b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7379 10836 bytes
font_02_sfnt_off000096b9.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96B9 4324 bytes

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