Malicious PDF — malware analysis report

Static analysis result for SHA-256 e11d25862524c076…

MALICIOUS

PDF

33.7 KB Created: 2020-08-17 18:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99d266648c15200ed006756405c016b8 SHA-1: 7c90e6f1f38f70850bed02d38a3f0350af1cb221 SHA-256: e11d25862524c076bc30b9e140c77e627c9c820085ffdf486fe197ad442f9d27
150 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a redirector service, which is a common technique for distributing malware or phishing pages. The document body text, though partially corrupted, includes a phrase related to downloading a book, which serves as a lure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the embedded URL.

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.cc/pify?keyword=descargar+libro+de+cero+a+uno+pdf
    • http://files.westoneheatingandair.com/uploads/1/3/2/6/132696030/213fd.pdf
    • https://cdn.shopify.com/s/files/1/0429/2752/1948/files/33891724595.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/totipamutoda.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3860/files/17354347312.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93016620893.pdf
    • https://cdn.shopify.com/s/files/1/0428/8577/5519/files/ligikutubutijes.pdf
    • https://cdn.shopify.com/s/files/1/0438/1710/7616/files/zafazadoko.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2533/files/nemikibuzub.pdf
    • https://cdn.shopify.com/s/files/1/0450/5174/0310/files/calculo_e_administrao_de_medicamentos_na_enfermagem.pdf
    • https://cdn.shopify.com/s/files/1/0435/4270/8378/files/53849120548.pdf
    • https://cdn.shopify.com/s/files/1/0432/0854/0324/files/13615599298.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gamawogedeveredu.pdf
    • https://cdn.shopify.com/s/files/1/0440/4209/2694/files/74988891248.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasebiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/6386/8573/files/jimovokimuxemutut.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_off00004399.bin
994649a229cf27afd4950831ac65b875916f3806451d61a4ef5189d641b41768		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4399 5464 bytes
font_01_sfnt_off0000562c.bin
22ea69b1cf4e82f68112e8b109bd19ded2c3e6ecdf1afad8decfc399f3ee87d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x562C 10704 bytes

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