Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cbe1081920c6bc3…

MALICIOUS

PDF

35.8 KB Created: 2020-09-21 02:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af7f58e708a200586a295ff298088a58 SHA-1: 008d52f2685212a198539792fe08b445c554ed23 SHA-256: 9cbe1081920c6bc36ee9e9277d0f8ef73d9fad140cee250e58ee36f7fa281f4c
150 Risk Score

Malware Insights

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

This PDF document contains a mass of external links, many of which point to a redirector infrastructure. The primary malicious URL identified is https://ttraff.me/wix?keyword=words+that+start+with+d+and+end+with+k. The document body text is obfuscated and appears to be generated content, likely to mask the malicious links. The presence of numerous links suggests an attempt to drive traffic to potentially malicious sites, possibly for SEO poisoning or phishing.

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.me/wix?keyword=words+that+start+with+d+and+end+with+k
    • https://a270572c-f090-43bf-a475-25e365167734.filesusr.com/ugd/564d2e_52731b4ed1f749e0825beaf45d1233c7.pdf?index=true
    • https://0423d15c-4812-42e4-9d26-5f5f903e5804.filesusr.com/ugd/4ae4db_9623a2ccad984dd88c7adabfd33f765d.pdf?index=true
    • https://0669b537-cb52-413b-9633-d0197260a006.filesusr.com/ugd/12dc78_f13f52ecf32b425e848e6f62c4d76545.pdf?index=true
    • https://2245d315-8cb8-401f-bbe1-0400d11896a8.filesusr.com/ugd/5ed537_3e008d1059e240d0abade9365b7cca37.pdf?index=true
    • https://2ea9c67d-d0d9-4392-97d4-d970aadc9ddb.filesusr.com/ugd/fd3290_3df1151ddab84617ad3296c62c163943.pdf?index=true
    • https://588620d3-ffb7-4951-8c28-1e13d5af1422.filesusr.com/ugd/384ea4_dfddf57b6c4b4234ae00ce120429cf45.pdf?index=true
    • https://9531d01c-9436-4bd9-b3e2-be63f4ead1d6.filesusr.com/ugd/e5d5e5_87c87303acae48b3b62b50a9513e01a9.pdf?index=true
    • https://b4e231aa-2c39-4620-af95-6be271367ced.filesusr.com/ugd/314c35_d6603e80da304d7da47cc1029d8b6d9c.pdf?index=true
    • https://4fc18a9b-5be2-4523-9a47-77f66014f465.filesusr.com/ugd/6d59ab_74598b263f774e48a49a60009b7b3628.pdf?index=true
    • https://4e7ddf7c-248e-432e-93d2-751757b4f16f.filesusr.com/ugd/73cb9e_16142c882d5d4f428eaa1d0b097e78cd.pdf?index=true
    • https://9f652b24-14d3-4086-892f-a96fa4ad6045.filesusr.com/ugd/48d9a1_5377779ac05a41eba5d118c7c1338738.pdf?index=true
    • https://05f689e1-18a8-4ef0-af17-329f39164d85.filesusr.com/ugd/a01749_cbfeebb3fffc4445accf8db02e6eaa25.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/9690/7684/files/ben_10_ultimate_tamil_movie.pdf
    • https://cdn.shopify.com/s/files/1/0478/3374/3519/files/phone_cases_for_samsung_j7.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/64989875230.pdf
    • https://cdn.shopify.com/s/files/1/0431/0227/3703/files/nasagefafenekesitunelo.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_off00004eb5.bin
d4ca6c03091983e0a51d33ed5da28e6805b2c82832779088102229ea04383abe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EB5 5048 bytes
font_01_sfnt_off00005ff0.bin
70341c5305a8b7f028dcaead9758ae20b7c05f63f573d9056834c048d57440f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF0 9992 bytes

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