Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0f2a8af33f33ac…

MALICIOUS

PDF

36.7 KB Created: 2020-08-02 15:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8356a5b35536c9437f5e45023ec43d3 SHA-1: 7601494087dc2997c9d3ffe4ad95bbd17afa2ad3 SHA-256: ad0f2a8af33f33acd9a25cecb6f5a47d1585b76c20805a9539efe680e397aea5
152 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one prominently pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to music, and the URL itself includes a music-related keyword. This suggests the PDF is designed to redirect users to malicious content, likely for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious.

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=hey+angel+one+direction+mp3
    • http://files.eliteadultevents.com/uploads/1/3/2/8/132815854/8687636.pdf
    • http://files.ctmeetingspace.com/uploads/1/3/1/1/131164159/zedax.pdf
    • http://files.arthurkeeganbole.com/uploads/1/3/0/7/130739945/1182362.pdf
    • http://files.stephenvince.net/uploads/1/3/1/4/131437516/2249803.pdf
    • https://cdn.shopify.com/s/files/1/0435/9713/6030/files/juxawe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/audiomack_chief_keef.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/kadozojabasumakepebuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/givinibewemilemuze.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/mutilesunofoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/mexopakupawajazowaje.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/118601314.pdf
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/dobixinemov.pdf
    • https://cdn.shopify.com/s/files/1/0433/9564/5589/files/xokutaso.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/72751457882.pdf
    • https://cdn.shopify.com/s/files/1/0435/9267/9582/files/babos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20011772627.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_off00005230.bin
73ff942c1944fe264cfe9512a433e7091fd9277f7d10a385b8f93160d4697d83
pdf-font-stream PDF embedded font (sfnt) at offset 0x5230 5444 bytes
font_01_sfnt_off000064ad.bin
8a287d1d5ed4fcad3109359edf48df886a59946325b85427a1c9e5ce3f6caa33
pdf-font-stream PDF embedded font (sfnt) at offset 0x64AD 9724 bytes