Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f57b15fc9275f45…

MALICIOUS

PDF

62.3 KB Created: 2020-08-17 01:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8582327dfc49cade06bc2593b0fd7208 SHA-1: f9c41743d11ab3f050b23d129b2c9436fc319bc8 SHA-256: 4f57b15fc9275f45dd76652dbb9888fe8771683954db28bcac8c7b440a071c27
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, a common tactic for SEO poisoning and driving traffic to malicious sites. One critical heuristic firing indicates a link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=pfsense+captive+portal+template+2018'. The document body, though heavily obfuscated, appears to contain references to 'pfsense captive portal template 2018', suggesting a lure to trick users into clicking on the embedded links. The presence of numerous links hosted on Shopify, while individually marked as benign, contributes to the overall link farm characteristic.

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=pfsense+captive+portal+template+2018
    • http://files.maggiemoris.com/uploads/1/3/1/6/131606011/12fdf4d29e9.pdf
    • http://files.tarotartist.net/uploads/1/3/0/8/130874647/vilipepixolabuf.pdf
    • http://files.lawrencemjackson.com/uploads/1/3/2/6/132695692/8e607ab.pdf
    • http://jukaj.cognitivecardiowithmsmm.com/uploads/1/3/1/3/131384260/9811158.pdf
    • http://files.deborahlawrenceschafer.com/uploads/1/3/2/6/132681579/b064cda64e8254.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/xejofa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/posovukerolazu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1944/files/4057423945.pdf
    • https://cdn.shopify.com/s/files/1/0431/3094/5693/files/o_brother_where_art_thou_movie_script.pdf
    • https://cdn.shopify.com/s/files/1/0428/8705/3471/files/26310024000.pdf
    • https://cdn.shopify.com/s/files/1/0435/4460/8932/files/glitter_text_generator.pdf
    • https://cdn.shopify.com/s/files/1/0453/5566/3515/files/tibefusoju.pdf
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/86364666579.pdf
    • https://cdn.shopify.com/s/files/1/0431/5299/8556/files/63441926012.pdf
    • https://cdn.shopify.com/s/files/1/0432/5287/5432/files/lord_you_are_always_here_with_me_chords.pdf
    • https://cdn.shopify.com/s/files/1/0428/8885/5718/files/conference_de_bandung.pdf
    • https://cdn.shopify.com/s/files/1/0438/3670/2870/files/letter_writing_activity.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/55403964111.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007aac.bin
120dfd7c7977cfb9a90e0c19aa24ce80f3ad63f69756627d616fe21accc03e95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAC 6424 bytes
font_01_sfnt_off00008a8e.bin
8f11ae2d4427c165cfc8aa659ecb42333b7d787a3c20fc6bfa362f8535e069b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8E 5740 bytes
font_02_sfnt_off00009dfe.bin
90048557dc72e2ebc6cc324e304f6607929f2c55f4462e1fa5c9d7b8ee1bf8e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DFE 5700 bytes
font_03_sfnt_off0000b189.bin
69bc213248832e60eaf1fc7526ab86c1a57f75392456de38a3c42b246666d8ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB189 10632 bytes
font_04_sfnt_off0000d618.bin
8e021f57f300adb1afc1ec848a2b9841dcad6b18539f41be1221894160acb062		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD618 16128 bytes

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