Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a4d5ec208d61581…

MALICIOUS

PDF

50.9 KB Created: 2020-08-21 12:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ddb3a4ee7be259931605ffbecc1c5ef SHA-1: fe829a6c73898e4d6bbfda26101fe6cfe82f5803 SHA-256: 4a4d5ec208d615819ed115236cb769af945703a2e55c908b9403ba0cf75d3a42
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an admission form, aiming to trick users into clicking it. The document body and heuristics indicate a lure for users to visit the malicious URL. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to increase visibility and traffic to the malicious site.

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.com/pify?keyword=admission+form+for+pune+university+2019
    • http://sador.cjbmaed.com/uploads/1/3/0/7/130739777/pixamokizek_kogaxakogili_vomadebedi_durudenenejegav.pdf
    • http://files.tomgauthier.com/uploads/1/3/1/6/131636956/0a671855.pdf
    • http://kitaj.noramacquarrie.com/uploads/1/3/2/7/132740763/1374125.pdf
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/anemia_falciforme_ministerio_da_saude.pdf
    • https://cdn.shopify.com/s/files/1/0432/0827/8171/files/wofavomujitotibuteza.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1266/files/vorobijavexake.pdf
    • https://cdn.shopify.com/s/files/1/0428/2993/8855/files/dujigotamuxebulumijezonuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/8597/8013/files/good_will_hunting_movie_free_hd.pdf
    • https://cdn.shopify.com/s/files/1/0435/7062/6723/files/restaurant_guide_michelin_paris_11.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/35040162408.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0902/files/basic_plc_programming_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/how_to_reset_bluetooth_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6828/files/68375931724.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/geometrical_tolerances_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0431/7816/4387/files/vifefij.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_off00007f6b.bin
96dd4f86da941f4e2e982a7cb983e60c34e08ed29941a99918072255c19991bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6B 5580 bytes
font_01_sfnt_off00009264.bin
7531521204db12797a0aa0dd6c3ffc9b7c2db76fadb7f2d9a9665403524bebc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9264 14240 bytes

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