Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d25f4f6d6343f5c…

MALICIOUS

PDF

42.3 KB Created: 2020-08-27 20:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d1bd688ae20de353ca25b28925f6e87 SHA-1: d64e2a193ecf32969a1aa186b9079fdfffb7ee7a SHA-256: 3d25f4f6d6343f5c71a6cc04805a5cfb71c1cc8bb0a388539f210e9218084a46
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=propiedades+fisico+quimicas+del+agua+pdf'. This indicates the document is designed to redirect users to a malicious website. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of a link farm heuristic further suggests a campaign to distribute malicious content.

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=propiedades+fisico+quimicas+del+agua+pdf
    • http://files.fwsomusicians.com/uploads/1/3/0/8/130814226/8950971.pdf
    • http://gemigil.bigtrecreation.com/uploads/1/3/1/4/131406535/napuxe.pdf
    • http://files.cs-wine-hk.com/uploads/1/3/0/8/130813923/0b1e9e6f3007.pdf
    • http://files.fwsomusicians.com/uploads/1/3/0/8/130
    • https://cdn.shopify.com/s/files/1/0436/4677/9552/files/fichier_svg_gratuit_pour_silhouette.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/29793181617.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/template_letter_of_applying_for_a_job.pdf
    • https://cdn.shopify.com/s/files/1/0437/9269/5456/files/6825336425.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/marogobijur.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5063/files/36927444546.pdf
    • https://cdn.shopify.com/s/files/1/0428/8829/8662/files/lamevago.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/voxul.pdf
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/mamepukenipa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/medade.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_off00006391.bin
c6076be88205ef56c0bb54c08674f4bd52ed090d39185e2e807216a9d5f2cdfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6391 5600 bytes
font_01_sfnt_off0000767a.bin
490a61f1dba20c0cf3a03f1e86b887e65f9dd16436433e3a0eb22cc96f3e9cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x767A 10972 bytes

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