Malicious PDF — malware analysis report

Static analysis result for SHA-256 2422dd5503136c25…

MALICIOUS

PDF

251.9 KB Created: 2020-07-30 06:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9be7121de1ed308ec07b6bac7f29c5a SHA-1: 9bace12e2e4dd0e74da78b75942793bc60aeb460 SHA-256: 2422dd5503136c252868798cd838205b583307e2d9f5b558f34616423369adb1
92 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. The document body appears to be corrupted or heavily obfuscated, but the presence of the malicious URL is the primary driver for this assessment. The file is likely intended to lure users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • 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=qasidah+burdah+terjemahan+pdf
    • http://files.mexpup.com/uploads/1/3/1/1/131164054/pomanimufot.pdf
    • http://files.seekersofdivinetruth.org/uploads/1/3/1/4/131406108/mukez.pdf
    • http://files.runcr.org/uploads/1/3/1/3/131382491/dc95c437cc04.pdf
    • https://cdn.shopify.com/s/files/1/0432/7335/5424/files/12111806529.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dekafarisajanitid.pdf
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/jovotifedefo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6894/7616/files/26191126035.pdf
    • https://cdn.shopify.com/s/files/1/0435/0171/5622/files/jewotol.pdf
    • https://cdn.shopify.com/s/files/1/0430/7828/7513/files/jawewotiwav.pdf
    • https://cdn.shopify.com/s/files/1/0428/6873/6166/files/laganamesuvigijezo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/lixajevujubidojo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/87941666109.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/virinafelowe.pdf
    • https://cdn.shopify.com/s/files/1/0428/4035/9068/files/vukug.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off0003a3ac.bin
11aca1d3e6521b980e12add8e5bb3a77a62f87c6dc010eccd2169135bab92649		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3A3AC 35552 bytes
font_00_sfnt_off00036c13.bin
11343e5cf76a5e2460ea578076e10b1f614772aefdc2cf71aabc8fbd487b9522		 pdf-font-stream PDF embedded font (sfnt) at offset 0x36C13 5300 bytes
font_01_sfnt_off00037dde.bin
1daa8584f02a9fe0f4df21d613c4c78a1df8b07c6b4f57eb7ac552044abe41d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x37DDE 11240 bytes

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