Malicious PDF — malware analysis report

Static analysis result for SHA-256 e937f799c337fab9…

MALICIOUS

PDF

33.2 KB Created: 2020-09-02 20:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a45e411f7eb89ffc753d59ee8921bb23 SHA-1: 2adc9728c3c7c8beb92f668ea9dc7d4c224fad47 SHA-256: e937f799c337fab9407f266d93b6844dcc00f246350d2d1bb76e3558be20367d
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as a free ringtone download. This is further supported by heuristics indicating a malicious redirector and a link farm. The document body contains the same malicious URL and a benign-looking PDF link, likely intended to obscure the malicious intent. The primary goal appears to be directing the user to the malicious ttraff.club domain.

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.club/wix?keyword=dj+bhajan+ringtone+free
    • https://cdn.shopify.com/s/files/1/0462/9010/8577/files/jomusiroputemaxanimuwopa.pdf
    • https://cdn.shopify.com/s/files/1/0440/6745/5128/files/66843999565.pdf
    • https://cdn.shopify.com/s/files/1/0463/0809/8205/files/kinkaid_lake_crappie_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/3543/4901/files/zoxafafa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3587/files/xidixaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7095/files/tefexaxowapo.pdf
    • https://static.usrfiles.com/ugd/5ecadc_bfe4e89f15b545cda04a6d92a911955e.pdf
    • https://static.usrfiles.com/ugd/221f3a_337845a736b6434aa28cac22f8a1249e.pdf
    • https://static.usrfiles.com/ugd/b8c837_8049b98673904312b7b2d5c28064677c.pdf
    • https://static.usrfiles.com/ugd/affaa6_06e2755a0875478f8f0d8d37cee83c11.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_off000044f1.bin
8ba8e6ef6c2ba00ab909471a0a28cb5c3d68f129dc399be53bc763c890d6f2bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44F1 5032 bytes
font_01_sfnt_off00005618.bin
ccb1f1a8951596634a2fca0516e454f84387f4a49b44e3b74479c20ccd88ab9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5618 10000 bytes

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