Malicious PDF — malware analysis report

Static analysis result for SHA-256 4157e237f4495242…

MALICIOUS

PDF

39.9 KB Created: 2020-08-14 15:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5dd757c2a87b70d19978e724943a5d97 SHA-1: e0aa32dd6c5ef33473a3ccd80c8902b0c46534d7 SHA-256: 4157e237f44952425021bb3088291fd7023173ecf2d9d2949c3c5aeb447fbeda
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body text, though heavily obfuscated, contains the phrase "Business plan application free" and a URL that matches the redirector. This suggests the document's purpose is to trick users into clicking the malicious link, likely for phishing or malware distribution.

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=business+plan+application+free
    • http://files.janithaphotography.com/uploads/1/3/1/0/131069887/5808741.pdf
    • http://files.padermpa.org/uploads/1/3/2/6/132681479/nigobumidifalo.pdf
    • http://refizeruf.medalliontradingcompany.com/uploads/1/3/1/3/131398294/jajibezuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/nobejizu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4485/5195/files/14588502116.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3813/files/72154181844.pdf
    • https://cdn.shopify.com/s/files/1/0448/4582/6210/files/columbia_paw_print.pdf
    • https://cdn.shopify.com/s/files/1/0432/8875/6374/files/17294616877.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/31684942448.pdf
    • https://cdn.shopify.com/s/files/1/0432/7617/3472/files/zepawow.pdf
    • https://cdn.shopify.com/s/files/1/0438/0668/7389/files/winzip_21._5_serial_key.pdf
    • https://cdn.shopify.com/s/files/1/0454/0376/6952/files/list_of_bharat_ratna_award_winners_till_date.pdf
    • https://cdn.shopify.com/s/files/1/0431/9612/1252/files/creative_writing_module_deped.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/kibakemofu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30617095305.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_off00005f37.bin
f70712aa4271b56670a826f2ccce001657cffc0a4ba93e420662e36df68ee7b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F37 5056 bytes
font_01_sfnt_off00007070.bin
fefefdbf33900915d0afd838cea81f71b587bca8c6f0612a8923cca275cfa4c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7070 10068 bytes

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