Malicious PDF — malware analysis report

Static analysis result for SHA-256 896b7a21f1138ec5…

MALICIOUS

PDF

41.3 KB Created: 2020-09-19 05:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4541f80b9dd003b7beb41991d71692e7 SHA-1: e0f301cddc676523fd773f1c5e375e3d1baa2a1b SHA-256: 896b7a21f1138ec5786934483055e06fbf592f15bd6bee62d7ccd1a14d5dc098
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm. One of these links, 'https://ttraff.club/wix?keyword=rexxar+guide+hots', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a lure to external malicious content. The presence of a malicious redirector link and the link farm structure strongly indicate a phishing or redirection attack.

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=rexxar+guide+hots
    • http://files.myspecialcrown.com/uploads/1/3/0/7/130740465/6020692.pdf
    • http://zotujut.theeaglegallery.com/uploads/1/3/1/4/131437363/3b46da.pdf
    • http://zebik.seedlingscorp.org/uploads/1/3/2/6/132681479/gexanenofapiza-jovopetez-sadubaral.pdf
    • http://files.pearldeangarden.com/uploads/1/3/1/4/131407424/1565877.pdf
    • http://files.saltyhairmamma.com/uploads/1/3/1/8/131856522/86bb5a.pdf
    • http://nixap.canaryvilleriders.com/uploads/1/3/0/8/130874388/lixovemopam.pdf
    • https://66d4f5be-eaaf-47a3-8ac0-ebe1f7b5b10f.filesusr.com/ugd/b2ba6b_f9f95fbf09ef4e6785d1ee2bd2796c71.pdf?index=true
    • https://7e7d9483-3dce-473e-91a3-fc9499291097.filesusr.com/ugd/db80c5_02946765873e42ee909aab92569edf79.pdf?index=true
    • https://7ee70f2c-0dea-4a82-8473-b962d4c32a19.filesusr.com/ugd/f91cf1_b974952999624e6a84d5f0d7cb3252de.pdf?index=true
    • https://4bf0b9d1-1159-481c-8736-2a917ee28a3a.filesusr.com/ugd/33a2e4_b6ba251fdc9649bdaa8f1d5b2eb33840.pdf?index=true
    • https://88b896bd-f7c2-4fe0-93d0-5580740e2cf1.filesusr.com/ugd/fdd6c2_c5080fba6e87414e82f4ef5a7a37f49f.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0435/9133/6099/files/area_of_irregular_shapes_using_integration.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/test_bocconi_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/7378/1408/files/esc_heart_failure_guidelines_2017.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_off0000658c.bin
8062339318cab7ea7406b920644a5159ccf382249a849ea974e4746d18a11f8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658C 5128 bytes
font_01_sfnt_off00007700.bin
77a222c2b734c4b07ede665338c8974097f661704c0543c1d7d80a7147fab882		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7700 9904 bytes

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