Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa39fde01add2bdb…

MALICIOUS

PDF

60.2 KB Created: 2020-08-29 13:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 993cc18baa9ebda54945a98d57f8c013 SHA-1: 2a9e40584b7e2087e5c6c2f8763929d97eb0befe SHA-256: fa39fde01add2bdbd05576ebcb8e60aba6fc11442338f3b24ffb0837d45e8c7b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to trick users into clicking. The presence of numerous benign-looking Shopify URLs is likely a tactic to blend in with legitimate content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/wix?keyword=encyclopedia+of+general+science+arihant+pdf+download
    • https://cdn.shopify.com/s/files/1/0433/5481/6667/files/how_many_seconds_in_an_year.pdf
    • https://cdn.shopify.com/s/files/1/0434/1216/0679/files/58761870763.pdf
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/brodin_kehilangan_mp3.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa31fdb34c2c4170a71b12bf901b44b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_6159d536557e434eb7e86a7a14553414.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7462/files/berkey_water_filter_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/astropad_for_windows.pdf
    • https://cdn.shopify.com/s/files/1/0436/7004/4825/files/mighty_mule_500_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/caribbean_beach_resort_map_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/2885/6477/files/machine_learning_cheat_sheets_kdnuggets.pdf
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/39405997328.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zenafepejeviwasi.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d93.bin
8259ff0bb927507e588446da14fba1c0620338aaa4f2eab6f70c7b4a9669111c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D93 5356 bytes
font_01_sfnt_off00006fcc.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCC 3720 bytes
font_02_sfnt_off00007b2e.bin
593b7cb95486ed2876177e5065a0c0f223be58ea728073e1e455aa500d741236		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2E 9980 bytes
font_03_sfnt_off00009d9c.bin
c8cad0fcbf711734ba90d1bf0f33d5774ae0d43a5fc07b95f2d0d23150af1919		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D9C 16088 bytes
font_04_sfnt_off0000b25e.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB25E 4324 bytes
font_05_sfnt_off0000c05f.bin
4e1d57950bd6431c4b42ee796ed9e65e8507bc3711ea9c0a9256b67868afde5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC05F 9664 bytes

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