Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d91f138a41ed3da…

MALICIOUS

PDF

40.1 KB Created: 2020-09-19 23:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ae9c549826935396d36955def296dc2 SHA-1: 413576e5af838a222ce5bddbe9d175509a4d1920 SHA-256: 3d91f138a41ed3daec3792bfa445b6adc4478dcbc98f25a22888811bced9748c
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for 'tubemate 2.2 6'. The document body and embedded URLs indicate a lure to download an application. The presence of a link farm further suggests an attempt to manipulate search engine results or distribute content broadly. No scripts were extracted, but the PDF structure and embedded links are sufficient to determine the malicious intent.

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.club/wix?keyword=instalar+tubemate+2.2+6+download
    • https://5b6c4d5b-2459-4050-b2e0-2c0640f72581.filesusr.com/ugd/9ea91e_1e0413915fcd463ca6b139f05c538862.pdf?index=true
    • https://982e1783-0bc1-4ad9-afb4-835963018bf2.filesusr.com/ugd/15cd4d_dfc5cf8bdd2a48f7a249fd610cc27a5f.pdf?index=true
    • https://31ae9d2b-47e5-4472-a4ef-5030f3e31781.filesusr.com/ugd/1d64af_6a010fdd763745039e2a0f516a8c27f2.pdf?index=true
    • https://98be1af6-7856-43a2-b737-3490b07cc93e.filesusr.com/ugd/ed1d2e_6f44f2090baf40528e06b3f9b3946cb4.pdf?index=true
    • https://74ff4352-405e-47d7-9285-7d9b979abfa6.filesusr.com/ugd/1be480_58dbbfc877e44065b7c7c12e03784db2.pdf?index=true
    • https://23d0ccb8-7007-48c2-825e-f6efb09cdde7.filesusr.com/ugd/105a8c_6602d160ba1f4efab5239532ae748753.pdf?index=true
    • https://256416e5-c5a2-40f8-880e-c44cd613a563.filesusr.com/ugd/694d5d_7826591029de4434b928ebb444c7870c.pdf?index=true
    • https://700b225d-ad57-4d02-ac0d-75d896144c5a.filesusr.com/ugd/277b62_b31192635e4144759796807fd10aea3f.pdf?index=true
    • https://b6552263-3d29-4c01-92ad-8bafd163d6fa.filesusr.com/ugd/717a42_d41b782e1d1747f4aaa82d79262222e6.pdf?index=true
    • https://d55466c8-e659-4a26-95da-d4902b42fb6b.filesusr.com/ugd/895bef_19f98de1f89e42cab8e60be7ef0196b2.pdf?index=true
    • https://45a7fb57-ee44-4e18-8baf-04b2042d9691.filesusr.com/ugd/1849a1_9481b4abb9844e3eae8d50826f8df947.pdf?index=true
    • https://0fb090c4-54ae-4589-a476-fb19969313d2.filesusr.com/ugd/0df15e_71f69e56eb6b4c0f97f5447569c0b420.pdf?index=true
    • https://f94101d7-1e57-4f97-838e-c44a81386cc2.filesusr.com/ugd/bfd78a_1571d5bc8c2e48bf9e9739ba06c8df83.pdf?index=true
    • https://422ec3fd-dc79-4b80-9d99-ef2b1e88b8c8.filesusr.com/ugd/4bb103_a2dd5b3bb0b9482aaa9441bcd0d6ce4b.pdf?index=true
    • https://ee7d70c6-29cc-4bcd-bacd-a86b8156c615.filesusr.com/ugd/23a6c3_0f405eefb120490c9ac5b0322d2fb275.pdf?index=true
    • 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_off00005e7e.bin
8d06a01ff4328a50db045e0a586be054c6ea2245473578f6633eb03f29cc1a01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7E 5456 bytes
font_01_sfnt_off0000710b.bin
9100ed27eed200d6490195febf118453b8efba07b79e4ef5f0b6e8995e12d0b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710B 10096 bytes

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