Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad57aa3c62b9904…

MALICIOUS

PDF

42.6 KB Created: 2020-10-17 09:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93e937f142bfdc76520a94bb15afb8ec SHA-1: a02d9c8cc95ef019889aa3a506d42ba705c0cc78 SHA-256: 4ad57aa3c62b990469924eba279406c51305f212bbd62ee6b9d79225af930c2e
120 Risk Score

Malware Insights

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

The PDF file contains a deceptive message prompting the user to 'Check spelling in pdf document'. This is a common social engineering tactic to trick users into clicking malicious links. The primary link identified, 'https://ttraff.link/123?keyword=check+spelling+in+pdf+document', is flagged as a known malicious redirector. Additionally, the PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or SEO poisoning attempt to distribute 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.link/123?keyword=check+spelling+in+pdf+document
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f8763169101d.pdf
    • https://jelamiwigu.weebly.com/uploads/1/3/1/3/131382248/009f684.pdf
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/zifirefaroramo_sufuriju_kuputup_vogupem.pdf
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f8920f78b68c.pdf
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f8760e13694b.pdf
    • https://uploads.strikinglycdn.com/files/07e29493-22ad-4487-bc33-8df23807590e/fanijimufavoxezedunafezuj.pdf
    • https://uploads.strikinglycdn.com/files/0e5fa446-7e62-4a05-b52f-b632e3063143/70909890998.pdf
    • https://uploads.strikinglycdn.com/files/30250a11-948b-4625-a871-11c2d90c23e7/62232720083.pdf
    • https://uploads.strikinglycdn.com/files/e35d68db-7c05-4346-9eac-bb31e6e24d38/44360187516.pdf
    • https://uploads.strikinglycdn.com/files/f4faca73-bbe2-4836-872a-d5605b55d406/71617102601.pdf
    • https://uploads.strikinglycdn.com/files/0fc185ba-256b-4b7f-9d31-3394ba2f6a47/4371020270.pdf
    • https://uploads.strikinglycdn.com/files/fed1e5f6-e892-4b83-af95-751233768ee3/26809736429.pdf
    • https://uploads.strikinglycdn.com/files/ccf6ac59-398d-4358-992b-17569f39fd0e/4170690298.pdf
    • https://uploads.strikinglycdn.com/files/c3e39d5d-df57-43e8-92c8-a76a2c38aaa0/49280764789.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_off0000686a.bin
979258c83d9cfea14ddb0a66da17a70ae2fba1cafe732a840ceaa661fead8809		 pdf-font-stream PDF embedded font (sfnt) at offset 0x686A 5232 bytes
font_01_sfnt_off00007a11.bin
00a7a6724f0dbbcda8648e820dcea535e93dabf1a5aa7a5aedd05634d20bc5d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A11 10688 bytes

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