Malicious PDF — malware analysis report

Static analysis result for SHA-256 347d773e7b37dc96…

MALICIOUS

PDF

41.0 KB Created: 2020-09-03 20:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9aff4765e5fb7a4f0957d9aa95c221d SHA-1: 120e8bad615e806beb5be11cf03ac14935df1ccd SHA-256: 347d773e7b37dc96bf2983d9ea9450f8de4f4b8ce5d8ae704802832385c2ffeb
150 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a pregnancy notification letter template. The primary malicious URL, https://ttraff.me/pify?keyword=letter+template+informing+employer+of+pregnancy, is designed to redirect the user to further malicious content. The file was flagged by multiple critical heuristics, including PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM, and a machine learning classifier.

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.me/pify?keyword=letter+template+informing+employer+of+pregnancy
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/therapeutic_apheresis_guidelines_2018.pdf
    • https://cdn.shopify.com/s/files/1/0437/7408/3233/files/zefopigagemutagimi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/beroxijatu.pdf
    • https://static.usrfiles.com/ugd/0d2fda_0d32bfb6c9774a478364bd188a326103.pdf
    • https://static.usrfiles.com/ugd/278743_9fe8416165524c4182f49ad27c0dea52.pdf
    • https://static.usrfiles.com/ugd/8ba634_b8c9284448c2447e8031190ecb2072d1.pdf
    • https://static.usrfiles.com/ugd/c6ac46_563077dd2d964bbd92000b17b5871bc6.pdf
    • https://cdn.shopify.com/s/files/1/0432/0837/6482/files/99609381562.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1293/files/kilefijafebirakobikavalo.pdf
    • https://cdn.shopify.com/s/files/1/0440/9737/2312/files/30335226024.pdf
    • https://cdn.shopify.com/s/files/1/0431/0450/1922/files/chronicle_movie_free_in_tamil.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_off000063c4.bin
c68634d204b923e3103d4cebb73e9f72f0b32c36002e7e4d1bd5db5b503afacc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C4 5200 bytes
font_01_sfnt_off00007572.bin
1db1802b94155f136955b9e679f820cb1cab2a918ef617703057a668afc47273		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7572 9868 bytes

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