Malicious PDF — malware analysis report

Static analysis result for SHA-256 5244d94cb2dc70f7…

MALICIOUS

PDF

33.6 KB Created: 2020-08-18 14:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05eb2f6f001be6291a93241e9dafbfcc SHA-1: 7caae8d1499924c268b2ff91c3b89c0375ca3a42 SHA-256: 5244d94cb2dc70f7a4bcb1cfa1ec78b1a0793f438a654e45b856d4acb3edf2e4
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating it is a malicious redirector link farm. The primary URL, https://ttraff.com/pify?keyword=ajena+myke+towers, is likely used to obscure the final malicious destination. The ML classifier also flagged this PDF with high confidence. No scripts were extracted from this sample.

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.com/pify?keyword=ajena+myke+towers
    • http://files.unitywinterguard.org/uploads/1/3/0/7/130739227/6b1394e557567.pdf
    • http://files.discipleskitchen.org/uploads/1/3/0/8/130814868/fotixidorutevuguf.pdf
    • http://files.besedin.org/uploads/1/3/1/4/131406430/4767363.pdf
    • http://files.aeh-ct.org/uploads/1/3/0/7/130776449/63b7ba7156e671b.pdf
    • http://files.jannahlottportfolio.com/uploads/1/3/1/8/131871849/934331.pdf
    • https://cdn.shopify.com/s/files/1/0428/9137/8854/files/67902978386.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0840/files/ti_connect_ce_software.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/54428767247.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/43701382794.pdf
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/30967952290.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/bagpipe_music_scotland_the_brave.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/fundamentals_of_electrical_engineering_leonard_s_bobrow_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0454/4541/5070/files/bourbaki_algbre_commutative.pdf
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/kojutizeloxedi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4700/files/latajiguzibudewilomemu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1031/files/bodie_kane_marcus_investments.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_off000046e6.bin
3fd5b3e6ebdbef7bf4fd2cf4c5c4455cf9d6d805df5e15e324476ccad5cdfc4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46E6 5124 bytes
font_01_sfnt_off0000585a.bin
e754a3eb4aad793019e6847255d3ddc5e12109f58787fe2caf971d8c63068676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x585A 9888 bytes

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