Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8b14ed11da8755…

MALICIOUS

PDF

42.7 KB Created: 2020-08-07 22:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96e091fdd448b71064f122f929562ea2 SHA-1: 74bbddd3b12815fca30ddf5c08a359b3aa15c3ee SHA-256: 9a8b14ed11da87553775d97bcdf3cbbd59042e659b8e76cf9de27a864d22a6c4
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=acuerdo+de+paris+medio+ambiente+pdf', suggesting a lure to trick users into believing it's a legitimate document. The presence of multiple Shopify URLs, some benign and some unknown, indicates a link farm strategy. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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=acuerdo+de+paris+medio+ambiente+pdf
    • http://files.kaufmanautogroup.com/uploads/1/3/0/9/130969488/3f061eb24b.pdf
    • http://files.dentalequipmentshop.com/uploads/1/3/2/6/132682607/jukevezadapepedalo.pdf
    • http://files.riverofliferanch.com/uploads/1/3/1/4/131406258/sizus_dafepumaxo.pdf
    • https://cdn.shopify.com/s/files/1/0436/7741/7625/files/33346788187.pdf
    • https://cdn.shopify.com/s/files/1/0436/8292/2646/files/vishnu_sahasranamam_lyrics_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34707652888.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/zigejezebalaporogonazed.pdf
    • https://cdn.shopify.com/s/files/1/0431/7478/9281/files/fimapatifopabitobarilojin.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/gapevodubomitowugamabi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1510/8765/files/41537195717.pdf
    • https://cdn.shopify.com/s/files/1/0440/3088/6053/files/tetajazuxeveditazesew.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/vawowapuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/86171461504.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/pananan.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_off000066eb.bin
3d47f9de82031b6fff85adddee4653d0b8a4b2baa57a8f4d738904019d8fa510		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66EB 5396 bytes
font_01_sfnt_off0000792b.bin
32220667321931a00b6b61159394f102f40f953b5af15db33d63bd08778ba638		 pdf-font-stream PDF embedded font (sfnt) at offset 0x792B 10880 bytes

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