Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ac6bb610865738…

MALICIOUS

PDF

39.0 KB Created: 2020-08-22 13:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9091af18f63cae2548f3eb5d381a23a SHA-1: 9484e5352d7057cba9efbea569c65b8f1f8af3d8 SHA-256: e2ac6bb6108657388721bd5a1e83e0fcfa268c35f23b775d59c10ade691d4c31
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though partially corrupted, contains the URL 'https://ttraff.cc/pify?keyword=build+a+marine+food+web+activity+answers' which is likely intended to redirect the user to a malicious site. The presence of multiple Shopify links suggests an attempt to disguise the malicious redirector within a large number of seemingly legitimate links.

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=build+a+marine+food+web+activity+answers
    • http://files.papermagicbook.com/uploads/1/3/1/8/131860787/nelakojopotazedi.pdf
    • http://files.offthebeamwoodworking.com/uploads/1/3/2/7/132741241/3258039.pdf
    • http://befuw.malebeautybible.com/uploads/1/3/1/4/131408899/798765.pdf
    • http://files.lacrosselongfellow.com/uploads/1/3/1/3/131381900/a757855776950dc.pdf
    • http://raluko.dexandra40.com/uploads/1/3/1/3/131397989/37581b354e51.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/72850345673.pdf
    • https://cdn.shopify.com/s/files/1/0429/4872/2851/files/86616881239.pdf
    • https://cdn.shopify.com/s/files/1/0431/7632/9373/files/isi_web_of_knowledge_author_citation_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3506/files/catalyst_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/24262503418.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7778/files/75639062552.pdf
    • https://cdn.shopify.com/s/files/1/0434/8801/8594/files/pogadarofupudub.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9015/files/causative_exercises_advanced.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_off00005a55.bin
b23d52a3218ef9518ad9ebfd62ecf84838d7113e4d54450cacd62b5d293ca625		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A55 5612 bytes
font_01_sfnt_off00006d67.bin
70dd3125dfd63be8eb1187be484864fde1b9c632a71a5638cb883e8298bb2069		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D67 9884 bytes

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