Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde77829905a8399…

MALICIOUS

PDF

42.1 KB Created: 2020-08-22 00:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9abba8f8f05cf6007d4c4f3d624dabd4 SHA-1: 177bf98b0cb28c565920d5067a8bb2b785bdd7c7 SHA-256: cde77829905a8399ad58d76de4043f0106998ee57906065e3d723552e8278424
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=mailing+list+sign+up+sheet+template', is presented as a mailing list sign-up template, likely to trick users into clicking it. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=mailing+list+sign+up+sheet+template
    • http://files.orthodoxiona.com/uploads/1/3/2/8/132815118/vawokerazev-pixipufuxiwej-masuda-vapunegasad.pdf
    • http://sipazalaz.stjohnshazleton.org/uploads/1/3/0/8/130815026/pinejixanar.pdf
    • http://files.pnagkc.org/uploads/1/3/0/9/130969343/34ec6003ed3089a.pdf
    • http://files.mydbcommunity.com/uploads/1/3/0/7/130740465/3251985.pdf
    • http://files.vacationcarefun.com/uploads/1/3/1/0/131070030/8731600.pdf
    • https://cdn.shopify.com/s/files/1/0432/7889/3214/files/digital_marketing_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/kezetoxunevukilirimuzavog.pdf
    • https://cdn.shopify.com/s/files/1/0441/0405/6984/files/2017_form_1040_itemized_deduction_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/pmay_subsidy_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/5665/1669/files/kovesedixopevumunema.pdf
    • https://cdn.shopify.com/s/files/1/0431/0443/6390/files/xolenilevodaneburipap.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5868/files/un55f6300_manual.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_off0000687e.bin
c5c3496e4b73c0780928e008cc8d30fa1f8b18e9116e79f3aec79c487de0e012		 pdf-font-stream PDF embedded font (sfnt) at offset 0x687E 5140 bytes
font_01_sfnt_off000079d7.bin
0ce2d10180837b037c11fce42b1f3054ebda194f07baa43dbab4afbf36656203		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D7 10004 bytes

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