Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b90579009d4cb6…

MALICIOUS

PDF

42.7 KB Created: 2020-09-18 23:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 528c79b89a54ef2e7b01d5a71438d420 SHA-1: 69ed2e9540fba60761e5afe156c3dd79efe4644c SHA-256: d6b90579009d4cb6ad886d5741b57221b28463d9dbc2aaa78336e987fa1050c3
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically `https://ttraff.link/wix?keyword=algebra+2+common+core+pearson+workbook+answers`. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to PDF files hosted on various domains. The document body, though partially corrupted, contains references to educational materials and the URLs, suggesting a lure to trick users into clicking through to potentially malicious content. No scripts were extracted from this sample.

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.link/wix?keyword=algebra+2+common+core+pearson+workbook+answers
    • http://files.leafsvanmij.nl/uploads/1/3/1/8/131857024/ab821cdf4d.pdf
    • http://files.blankpagesworkshops.com/uploads/1/3/2/3/132302824/kesujaxarum.pdf
    • http://files.boujeebbeauty.com/uploads/1/3/0/7/130776168/848769.pdf
    • http://files.oregonoutbackadventures.com/uploads/1/3/1/8/131872015/9714849.pdf
    • http://files.rpfalconer.com/uploads/1/3/1/3/131398560/relarenig.pdf
    • https://57f3032d-d4a8-42bb-8db5-bc6935d436f7.filesusr.com/ugd/54e393_7c3cec482bb54180934528b03aed3064.pdf?index=true
    • https://b3d2e8b1-d41c-4ef6-aa31-241d3e77625b.filesusr.com/ugd/008a9f_21e1daf145c64f5aaedf1a725c6588d5.pdf?index=true
    • https://46d8c209-e224-4aa1-99f9-3c48cd3ac4b6.filesusr.com/ugd/72b0e7_082b9049184d4a6ab8398817937007d8.pdf?index=true
    • https://e9729b69-2557-4be3-86c9-a3077739f920.filesusr.com/ugd/69695d_f27787e89b3847d8875acf13bf1fbb31.pdf?index=true
    • https://3e637896-be8c-4cfa-8025-6c33c1ad08dd.filesusr.com/ugd/fb5067_1d769aa924aa46178ac2faa2cd5e3a51.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/kitamibusexugiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/dedodolal.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0590/files/kaisi_yeh_yaariyan_title_song_o_yaar.pdf
    • https://cdn.shopify.com/s/files/1/0433/5386/6408/files/favafugojisefugepujusele.pdf
    • https://cdn.shopify.com/s/files/1/0434/0065/9100/files/darobokefelifigevak.pdf
    • https://cdn.shopify.com/s/files/1/0458/1258/0518/files/maestros_de_la_calidad.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/cell_block_tango_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0439/8841/8718/files/sbi_chargeback_dispute_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/8561/8583/files/best_place_to_find_cougars.pdf
    • https://cdn.shopify.com/s/files/1/0438/0501/6226/files/xubikovagekiza.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/
    • https://cdn.shopify.com/s/files/1/0438/0501/6226/files/xubikovagek

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ce3.bin
b204af25b05ae1d370b08b78e93750fe13c346542dfba01266a6b440ecea8a0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE3 5672 bytes
font_01_sfnt_off0000702d.bin
96590bbec4832e659a7ecde25e07839a22ccaf4ea62fc1a21546f22a114cb616		 pdf-font-stream PDF embedded font (sfnt) at offset 0x702D 13868 bytes

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