Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2ee5643c3b4956…

MALICIOUS

PDF

59.9 KB Created: 2020-08-25 08:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3519f638cadd17edde5971b91cd2f0f1 SHA-1: 8e427dccea64621dc431fe97262ac9a482efd587 SHA-256: 2e2ee5643c3b49560f9031d61896115e64be12ca67b657398f8b42cd2c2434da
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of multiple links to potentially compromised Shopify domains and other unknown hosts suggests a broad distribution effort.

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://ttraff.ru/pify?keyword=formal+dresses+for+8th+grade
    • http://files.theorlandorealtor.com/uploads/1/3/0/7/130775014/e6306.pdf
    • http://narozeje.valkariefineart.com/uploads/1/3/1/3/131379230/zividejikuwosujedom.pdf
    • http://riteje.edmondpiano.co.uk/uploads/1/3/2/6/132695903/gumerolibi.pdf
    • http://mudexe.horriganarchitect.com/uploads/1/3/1/3/131383042/wafomutosoxibefi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8189/8913/files/evaluation_of_aerosols.pdf
    • https://cdn.shopify.com/s/files/1/0429/4167/7731/files/levupobamidepaxapeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/broken_heart_song_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/4347734459.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/mixasozavepedipisid.pdf
    • https://cdn.shopify.com/s/files/1/0429/1044/9830/files/89320348457.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23083433767.pdf
    • https://cdn.shopify.com/s/files/1/0429/1146/5638/files/rizazexepematuwusodaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/8948/5221/files/74948020394.pdf
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/ad_d_2nd_edition_free.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_off0000ac8d.bin
2beab0f8986cc6b5dc2d91d4551b56ab3a53da94c3aedaf62099bbd3c750207d
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC8D 5472 bytes
font_01_sfnt_off0000bf00.bin
19732f137c1f4f6d73700113773d16b91b3059f57ccdc2012f5c034b0d43e9e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF00 10292 bytes