Malicious PDF — malware analysis report

Static analysis result for SHA-256 36226dcc8222a3a6…

MALICIOUS

PDF

94.8 KB Created: 2020-07-27 10:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34ed30d0b739cf387321aa05929a37d9 SHA-1: cc1fdbbcbfee3fe95181a331fd9ec19dd6b044f5 SHA-256: 36226dcc8222a3a662d79f38498327af108ffaf2568b19da79c6a89053d9f35d
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains text related to 'Bahubali malayalam film songs', suggesting a lure to entice users to click the malicious link. The presence of numerous external PDF links further supports a link farm or redirection strategy.

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.cc/pify?keyword=bahubali+malayalam+film+songs
    • http://files.travelerstateofmind.com/uploads/1/3/0/7/130776120/ditevafakebuza.pdf
    • http://files.mrskramlsclass.com/uploads/1/3/1/1/131164456/vorusepevorize-vujumojamide-polur.pdf
    • http://files.historicinterpretations.org/uploads/1/3/0/9/130969249/watajodoxetulixudape.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4701/files/39253479450.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/2996/files/4903981973.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67572949107.pdf
    • https://cdn.shopify.com/s/files/1/0437/5291/5098/files/jilodinofirusebak.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/52503437508.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dovaxetudomorunuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/4573/9931/files/dujaxot.pdf
    • https://cdn.shopify.com/s/files/1/0430/9064/1047/files/fesasegaxomudibutigam.pdf
    • https://cdn.shopify.com/s/files/1/0434/1465/1038/files/35432868883.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/52579704445.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff46.bin
52b46fcee8285c57efc29cb1261bddf0522b7b9b952a4bd74d1236787ac4a6d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF46 6872 bytes
font_01_sfnt_off00011685.bin
ef888d797b0098327af6bc6541a870bc9b46d0c5f3cb5531bc01e42090845f18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11685 5060 bytes
font_02_sfnt_off0001279f.bin
a6452b0e0cf7dd9114b1f2cd7085c4d886d69455c95b9d907f8c70bb43bc9de8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1279F 15592 bytes
font_03_sfnt_off000157f4.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x157F4 16164 bytes

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