Malicious PDF — malware analysis report

Static analysis result for SHA-256 567b3212cca75ac9…

MALICIOUS

PDF

55.0 KB Created: 2020-08-10 00:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a39a8d643fcfa103db2b0a1cbcecc177 SHA-1: c4dcb491e74e2a0511f17547a8cf31915d8fecf9 SHA-256: 567b3212cca75ac94175f59901060757c6da50fe1b126a2a2aa14a7b2200b634
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.ru). The document body, though heavily obfuscated, contains the same malicious URL and a large number of benign-looking PDF links hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The primary malicious link redirects to 'https://ttraff.ru/pify?keyword=aprender+portugues+livro+pdf', which is likely intended to lead the user to a phishing or malware distribution site.

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.ru/pify?keyword=aprender+portugues+livro+pdf
    • http://files.openhouseeducation.com.au/uploads/1/3/0/7/130740128/042d7023429a698.pdf
    • http://divof.elbowtree.com/uploads/1/3/0/7/130738837/4f48b2.pdf
    • http://mikokifos.ddtpphinc.com/uploads/1/3/1/4/131437792/sonepogo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2492/4319/files/finijojibav.pdf
    • https://cdn.shopify.com/s/files/1/0454/4741/3910/files/baldur_s_gate_enhanced_edition_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/gutede.pdf
    • https://cdn.shopify.com/s/files/1/0434/8248/0806/files/26035147031.pdf
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/bopez.pdf
    • https://cdn.shopify.com/s/files/1/0432/6578/6006/files/sigibamep.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/foxavuvuko.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/63146973831.pdf
    • https://cdn.shopify.com/s/files/1/0440/0755/5222/files/calidad_humana_en_el_trabajo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0023/files/disadvantages_of_globalization.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3755/files/wifaluwixodamatok.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_off000087a3.bin
50f4541f4a5647c9589778b362afc9ec72626d39bab75852c34dd5cac1a1694e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87A3 4928 bytes
font_01_sfnt_off00009880.bin
f7377775118f97fb466323ab91d949e3d51196d0e6a58ee48d1b2a8f9b05c109		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9880 13080 bytes
font_02_sfnt_off0000bf7e.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7E 4324 bytes

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