Malicious PDF — malware analysis report

Static analysis result for SHA-256 49388a7f885c99f8…

MALICIOUS

PDF

118.8 KB Created: 2020-08-02 13:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 055b170644e3b68c10600b45b913c79d SHA-1: 6857a42dffc040b10f059584541bc3947e6eb32a SHA-256: 49388a7f885c99f8c3176156a67ff46f547ad87425f441d1a31121433485758b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=where+is+httpd.+conf'. This URL is embedded within the document body, suggesting a social engineering lure to trick users into clicking it. The PDF also hosts a large number of external links, indicating a link farm for SEO manipulation or traffic redirection. The ML classifier strongly supports the malicious nature of this PDF.

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=where+is+httpd.+conf
    • http://files.decgallery.com/uploads/1/3/1/3/131384789/cc8b20d.pdf
    • http://files.thefashionanalyst.com/uploads/1/3/1/3/131383624/wezunawe.pdf
    • http://files.victoriaedgarr.com/uploads/1/3/0/7/130775434/1978109.pdf
    • http://files.minnesotahistorymuseums.org/uploads/1/3/1/4/131453985/6628160.pdf
    • http://files.illawarraanxietyclinic.com.au/uploads/1/3/1/6/131606390/6c164.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/97860196840.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8607/files/gojug.pdf
    • https://cdn.shopify.com/s/files/1/0431/5136/0164/files/44346010989.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/24636469773.pdf
    • https://cdn.shopify.com/s/files/1/0436/0932/5730/files/tizajuwigemamapugodadu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0348/5092/files/96_monte_carlo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/38116802708.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4470/files/tiditidoro.pdf
    • https://cdn.shopify.com/s/files/1/0434/9191/7989/files/vokesutedegovetazop.pdf
    • https://cdn.shopify.com/s/files/1/0435/0305/9110/files/tuvedu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49605194079.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_off00019954.bin
54eed533f1ede719ba62b60e7f3ef84bf2a417c5e67ef36a0f5f825aa1b92cf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19954 5048 bytes
font_01_sfnt_off0001aa97.bin
5c4f475e380abe672d009016f402972658e73fe01d149562f1117eb97fb904cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA97 10228 bytes

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