Malicious PDF — malware analysis report

Static analysis result for SHA-256 292cef695e21cfd9…

MALICIOUS

PDF

53.4 KB Created: 2020-08-01 12:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4e7646f598e29d1e01fa20401104fe9 SHA-1: 4fc3ff81f3d40241d979f57c203e806eb2bd4fdd SHA-256: 292cef695e21cfd9eb92865c855f1bb9920aeefb3b17d188a48eaca7dd27d45c
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=algebra+2+study+guide+pdf, which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains text related to 'Algebra 2 study guide pdf', indicating a lure to entice users to click the malicious link.

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=algebra+2+study+guide+pdf
    • http://files.maryjzach.com/uploads/1/3/1/3/131398231/b36b8d19.pdf
    • http://files.michaelbrownslawoffice.com/uploads/1/3/1/4/131406762/xajixolaxexojobegu.pdf
    • http://files.cartwheelfoundationintl.org/uploads/1/3/0/7/130739532/4563928.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/nexunuzeru.pdf
    • https://cdn.shopify.com/s/files/1/0433/1690/4104/files/suxawofebokigitaxode.pdf
    • https://cdn.shopify.com/s/files/1/0430/7694/4033/files/97306526801.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57148414383.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/44092119841.pdf
    • https://cdn.shopify.com/s/files/1/0440/8557/5845/files/cub_cadet_rzt_50_parts.pdf
    • https://cdn.shopify.com/s/files/1/0432/2682/4863/files/sesizidalepuvipazajoti.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/28526170667.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/luwipatekusamesozepija.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_off0000876a.bin
34da5433f46995d119fd707fb58749c008e4bc79dbc1a3f514858ceccee01ef9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x876A 5572 bytes
font_01_sfnt_off00009a6d.bin
1dd41baccaa601cc13d123d4a8539123f976b0c6daa8c01829f50e141c048f02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6D 14632 bytes

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