Malicious PDF — malware analysis report

Static analysis result for SHA-256 83d3aeb44b5eda22…

MALICIOUS

PDF

41.9 KB Created: 2020-09-01 18:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8676d21ee3c880da835aee0ac1fed68e SHA-1: 7324aad2da30291a0f9eb8385584a9f381ec608e SHA-256: 83d3aeb44b5eda224b6d73b61c751297d934eeeb2de90ca0528bb0470f93fc72
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.cc/wix?keyword=exercise+powerpoint+template'. The document body, though heavily obfuscated, contains text related to 'exercise powerpoint template' and the malicious URL. The presence of numerous PDF links, many pointing to benign Shopify domains, suggests a link farm or SEO poisoning attempt to mask the malicious redirector.

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=exercise+powerpoint+template
    • https://cdn.shopify.com/s/files/1/0428/5058/2684/files/adjective_and_adverb_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/4120/8992/files/8510940047.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7576/files/393043281.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/75561982131.pdf
    • https://static.usrfiles.com/ugd/227d0f_be6322e15827480ebd0af6bbca7e1813.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f7374e4ddc74456af9432fd1a30e279.pdf
    • https://static.usrfiles.com/ugd/1e32c2_8e1a12807c2f4ab5bf52f1163a88784e.pdf
    • https://static.usrfiles.com/ugd/6cf392_aa374dd7c3964019a29f40b77f688b3f.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_795155e6a58a4b69b42404448f305c11.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe4d9c8af72f41e586bcfa1bbda90240.pdf
    • https://static.usrfiles.com/ugd/f84671_d623fa1c174244c38aa3835efd0651e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_622fb092c81a4dcaa75e32c6b5e78e1a.pdf
    • https://static.usrfiles.com/ugd/b88e3d_09ed5ea0c9654fa4a7d8a38459e0141f.pdf
    • https://cdn.shopify.com/s/files/1/0439/0905/4619/files/55574952469.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/96875573988.pdf
    • https://cdn.shopify.com/s/files/1/0448/2197/1104/files/whirlpool_duet_steam_dryer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/ziredulizedopuf.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_off00006735.bin
99b638688804f8b6bb8bca2d9662dd8cae9ba3584a33162d64a22598e8f9e732		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6735 5196 bytes
font_01_sfnt_off000078e5.bin
fe18aa74ac965156a4b658f480dbe199b14ddc10c08dd92e9d9dede81ba3a254		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E5 9796 bytes

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