Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f46c363e4a55fb…

MALICIOUS

PDF

65.7 KB Created: 2020-08-02 17:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 076a8274151e704e5efb29fa8b65b3aa SHA-1: 8bdde36158c0e7f4f475b02f103d77884c776203 SHA-256: 27f46c363e4a55fbbb917c3b469a24d720c3665eef83db045cdaeb7387f563de
150 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a document about making lists in LaTeX. The primary heuristic indicates a critical PDF redirector link to ttraff.ru, which is known malicious infrastructure. Additionally, the PDF contains a large number of external links, suggesting a link farm for SEO manipulation or to distribute further malicious content. 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.ru/pify?keyword=how+to+make+a+list+in+latex
    • http://files.evandaleresort.com/uploads/1/3/0/9/130969717/xuvere.pdf
    • http://files.clearhrsolutionsd.com/uploads/1/3/2/3/132303138/fozakezemiv.pdf
    • http://files.brentridgecommunity.com/uploads/1/3/1/8/131871704/revuliwituvo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/menowexuxeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2635/files/73089297371.pdf
    • https://cdn.shopify.com/s/files/1/0429/9964/4314/files/56208592558.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/gipamuwokudanixofapufipo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/58938841341.pdf
    • https://cdn.shopify.com/s/files/1/0438/7107/6520/files/53711883753.pdf
    • https://cdn.shopify.com/s/files/1/0436/0133/0339/files/kefitum.pdf
    • https://cdn.shopify.com/s/files/1/0428/1014/6983/files/divuvalijuvutekare.pdf
    • https://cdn.shopify.com/s/files/1/0429/2801/3471/files/engineering_mathematics_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0434/0056/0805/files/3565679291.pdf
    • https://cdn.shopify.com/s/files/1/0435/4270/8378/files/kayla_itsines_2._0.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_off0000bedb.bin
b5f91a8c8c08131d3268e426226993e37424df869074fa4524194dae4211b740		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEDB 4920 bytes
font_01_sfnt_off0000cf92.bin
0e54c268ad8128d6294dd1a0bae1d16ef85d397caa77fd4661947c81fd97dc3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF92 13068 bytes

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