Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f07c8d55528e68c…

MALICIOUS

PDF

36.7 KB Created: 2020-08-10 17:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d62be1e33944f720ba45c67f92f1bd8 SHA-1: 436662b792b7b0b178abcf8ddd0baf7193365837 SHA-256: 4f07c8d55528e68c48567db224ddc60c65959f8a3975fcd5acb461c351183771
128 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to a medical handbook and includes the malicious URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a link to malicious infrastructure, and PDF_SEO_LINK_FARM indicates a large number of external links, likely for SEO manipulation or to host further malicious content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=oxford+handbook+of+accident+and+emergency+medicine+pdf
    • http://files.actiontire.com/uploads/1/3/0/9/130969754/66c24c37f820.pdf
    • http://files.thekesine.com/uploads/1/3/0/7/130775588/1140004.pdf
    • http://files.angelaadockter.com/uploads/1/3/2/6/132681492/9128e4b92f50.pdf
    • http://xilurez.shorelinehicap.org/uploads/1/3/0/8/130814526/40f02cc547975d.pdf
    • http://files.withhiminheavenlyplaces.com/uploads/1/3/0/8/130814868/pofaketikirupim-memedorevog-vuvopusexa-jazikurimew.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/vunufizejopirilil.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8734/files/100_carols_for_choirs_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/3126/3394/files/jefaxixivak.pdf
    • https://cdn.shopify.com/s/files/1/0439/8238/9406/files/lafinixemapekemotijatum.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/fudewelipilupiwivosukana.pdf
    • https://cdn.shopify.com/s/files/1/0430/9113/2567/files/46605420549.pdf
    • https://cdn.shopify.com/s/files/1/0434/9673/4885/files/jakolefix.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8359/files/67394793953.pdf
    • https://cdn.shopify.com/s/files/1/0438/2742/9533/files/american_english_file_2_workbook_resuelto.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3887/files/pan_card_offline_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/6426/1797/files/xevunaburo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000456b.bin
1d3feef2b0a1d2be69529406389b01c7b058c91680c135c0b7201127b2557149
pdf-font-stream PDF embedded font (sfnt) at offset 0x456B 5548 bytes
font_01_sfnt_off00005827.bin
f9aaff1052f94ea22b8ea030378276bcaea152a6b566f47808c779b8c2dc3cb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5827 9060 bytes
font_02_sfnt_off00007714.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7714 4324 bytes