Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8394ae15a15095a…

MALICIOUS

PDF

67.5 KB Created: 2020-11-03 13:47:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fd3622259805c2efe0bb20f3bbf65f2 SHA-1: 12d8601366a8a0cd026cb76e632d5612a6ca522f SHA-256: e8394ae15a15095ae74db95d1a4da4051826c367f50ada20e70bf63b71b7c22a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links to known malicious redirector infrastructure, specifically directing users to 'https://gettraff.ru/123?keyword=dsp+128+digitech+download+manual'. It also functions as a link farm, pointing to numerous other PDFs hosted on external sites, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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://gettraff.ru/123?keyword=dsp+128+digitech+download+manual
    • https://wepoduxusuduxi.weebly.com/uploads/1/3/4/3/134306179/vajoka.pdf
    • https://najunores.weebly.com/uploads/1/3/4/3/134381484/1595840.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/8d2cf8ea-3bbe-457a-a183-7d6f4fec1428/70031753980.pdf
    • https://uploads.strikinglycdn.com/files/d31dcb04-0982-4f10-89c8-6ddf386dbd1f/stonehearth_free_download_alpha_21.pdf
    • https://uploads.strikinglycdn.com/files/83ab3498-0991-45eb-be1d-fd759a4b5b38/74949401918.pdf
    • https://uploads.strikinglycdn.com/files/ea26a4d5-25d7-4235-acda-d452b2b156cb/82029063362.pdf
    • https://cdn.shopify.com/s/files/1/0503/1441/2190/files/roger_federer_hat_amazon.pdf
    • https://uploads.strikinglycdn.com/files/980b2a2f-f174-4fcc-b7d5-e2d15f5a8395/21546796322.pdf
    • https://uploads.strikinglycdn.com/files/2846d7d9-1214-4a63-8702-56e3112d54c8/92909789611.pdf
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/ludo_king_unlimited_coins_hack_apk.pdf
    • https://uploads.strikinglycdn.com/files/6a4190e8-99e0-4d51-b46c-0d29a23a2313/rowateborufetomikusiziden.pdf
    • https://uploads.strikinglycdn.com/files/764c5861-14db-4f3f-95f4-2d1b90565326/44445280149.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9f1.bin
fb944adb6eafed8e04c5d1b96097a4dfd4fa99d28632a7455db657b007aae892		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F1 5744 bytes
font_01_sfnt_off0000cd6a.bin
b543aa8beb18c1d9855e4479eff1ccd162b7b51f5af65cb09e16b57c48a3aeb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6A 11044 bytes
font_02_sfnt_off0000f2f3.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F3 4324 bytes

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