Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec77175cfef3653…

MALICIOUS

PDF

247.2 KB Created: 2020-07-09 02:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c57eabdb8b1f0e4dd4588a1e338d852 SHA-1: 1e729b260c7342050603a8fb314dd080806b175b SHA-256: 2ec77175cfef36530186525818c65c0610668b5881d4837d831e87276e95dd08
92 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is highly indicative of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the presence of the malicious URL is sufficient to classify the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wb?keyword=hyponatremia%20treatment%20algorithm%20pdf
    • http://files.vibrant-energies.com/uploads/1/3/0/8/130873907/nomadu.pdf
    • http://files.modernruthboutique.com/uploads/1/3/1/3/131384552/tevozafadibape-keviwukugifunup-zudewe-fogagobezikowob.pdf
    • http://files.hiramring.com/uploads/1/3/1/4/131482930/fd45e909f317.pdf
    • http://files.my-bijoux.nl/uploads/1/3/1/4/131409055/kisokin.pdf
    • http://files.lvmphotoshuntingtonwv.com/uploads/1/3/1/3/131384145/fewizuki_kegatebo.pdf
    • http://files.helptakeaction.com/uploads/1/3/2/6/132681938/3009213.pdf
    • http://files.lkoc.org/uploads/1/3/1/3/131383497/bofepowoj.pdf
    • http://files.lakefieldbaptistchurch.org/uploads/1/3/1/0/131070523/lugutogaponajebabu.pdf
    • http://files.onmyownwave.com/uploads/1/3/1/6/131607269/9123717.pdf
    • http://files.lydiavelarde.com/uploads/1/3/1/8/131857690/1701917.pdf
    • https://bulivoxe.files.wordpress.com/2020/07/nabafimojiwonivemagesu.pdf
    • https://dolixojov.files.wordpress.com/2020/07/juxiwu.pdf
    • https://gamumibas.files.wordpress.com/2020/07/72792435288.pdf
    • https://datunexa.files.wordpress.com/2020/06/gureguxosijupos.pdf
    • https://xarefuwun.files.wordpress.com/2020/06/wovixevivewolesowap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45292738862.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tedogunugovosilogupex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ganisififado.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lejozusuxawunulimedobina.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_off00037808.bin
e06234f2eef6eb576c43b668547f6d132722fc4df9faa257bdee8c70b20a3f2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x37808 5128 bytes
font_01_sfnt_off00038942.bin
9d90dc1a76e9e045a09657f9d82d611a61b9bcbf01702c35c91bd63741d8572e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x38942 14812 bytes
font_02_sfnt_off0003b8dc.bin
f5e2e3ed68bda4c42ee7d15233e47cbac1e9d02bde8e3bc48c40c65f7cf7b4be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3B8DC 16460 bytes

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