Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe9086b9078efad…

MALICIOUS

PDF

47.9 KB Created: 2020-07-11 15:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa6eafb65b1e24f91a5f05084f5f0548 SHA-1: dff8093bbc45e94a4fe60408e887601159daee84 SHA-256: ffe9086b9078efad6f46babab152d5cbc9ec10183a78713306f641a9a8da1f28
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=incident+report+writing+scenarios', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to trick the user into visiting this malicious site. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=incident+report+writing+scenarios
    • http://files.risingravenband.com/uploads/1/3/1/3/131384018/buvab.pdf
    • http://files.iwstreecare.com/uploads/1/3/2/7/132740479/wogupu-zukokitoruwogog-zikezugufada-pubuzesilas.pdf
    • http://files.pfcmooremess.com/uploads/1/3/0/7/130776072/65264bc54.pdf
    • http://files.mechuwana.org/uploads/1/3/2/6/132682386/videzuzefotu.pdf
    • http://files.georgiahormones.com/uploads/1/3/1/6/131637168/1b4dd83a934d427.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/33666865918.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/nopolopopo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasamonuje.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/medafabodi.pdf
    • https://pisamodu.files.wordpress.com/2020/07/mawiziwuvikakaju.pdf
    • https://devejav.files.wordpress.com/2020/07/jazibikujoxupi.pdf
    • https://zunuxav.files.wordpress.com/2020/06/dalibumanonokonax.pdf
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/vadanupuzilekofezurimazel.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/momavuvopogamilutatalikam.pdf
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/subixebofipubafoxefe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/90265566119.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48787523288.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/76087239037.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gevuruliwineda.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_off000078fb.bin
3c7fc9ea61d68134db9c1f84fa44495c4fe15b36997d80fbcb970cba49a92f56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78FB 5028 bytes
font_01_sfnt_off00008a22.bin
3ba2bdf2578791918b393e2ee1574bdeba270b737e0f40c2c9761932105ae139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A22 12664 bytes

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