Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4f49e1772eec31d…

MALICIOUS

PDF

47.8 KB Created: 2020-08-01 12:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82a1a04179eda06c5384726065fb427a SHA-1: 5a1b6f4c51189c78fe906f1f458a9cbe5ee7a8ae SHA-256: e4f49e1772eec31d494a68ac680795c85bffef1adef4a7839fdb99832292a938
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=speed+up+rsync'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links. The document body, though heavily obfuscated, contains the same redirector URL, suggesting the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

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=speed+up+rsync
    • http://files.recoveryusingthebible.com/uploads/1/3/0/8/130813063/5825720.pdf
    • http://files.yolga.nl/uploads/1/3/0/7/130775518/velirijitarafuvos.pdf
    • http://files.fromoureyes.com/uploads/1/3/0/7/130775701/xugerobulolazowelos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/43084979076.pdf
    • https://cdn.shopify.com/s/files/1/0440/2891/9973/files/35104877344.pdf
    • https://cdn.shopify.com/s/files/1/0440/8773/8533/files/87133550682.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7461/files/lagexakejavoxilif.pdf
    • https://cdn.shopify.com/s/files/1/0431/6925/1487/files/92226729202.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/relion_wrist_blood_pressure_monitor_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/fufeluwevipidatikaka.pdf
    • https://cdn.shopify.com/s/files/1/0435/7976/8995/files/33059757063.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xajubebajodefemun.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/59992690887.pdf
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/kapidufizasiruzaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/79971302202.pdf
    • https://cdn.shopify.com/s/files/1/0438/3893/1109/files/lavalubowibuzejopel.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/
    • https://cdn.shopify.com/s/files/1/0433/0936/7461/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d28.bin
0a924eb9c889c3de8fe2dd6cb035cb39545874596f0f6cc312e4cbcb3dbe8d61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D28 5032 bytes
font_01_sfnt_off00008e5d.bin
bb28a1c185d905488279ccd7429efd9f896dd931e44d63725a3bad407118a74c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5D 10516 bytes

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