Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf45f6d2ed18d719…

MALICIOUS

PDF

42.5 KB Created: 2020-08-02 21:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0dd85fcebca9b268609d448c4bc68ed SHA-1: 76225e67517f0616ee0df0bf03852f956c96251d SHA-256: cf45f6d2ed18d71911ee42d7a3d5620540cdffc4b61049a7329e95a4320be028
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=ashanti+foolish+download', which is also listed as a malicious redirector. This suggests the PDF's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution. The ML classifier also strongly indicated 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=ashanti+foolish+download
    • http://files.firstteam904.org/uploads/1/3/1/4/131453121/lebonik-delaka-xotamanofed-xukib.pdf
    • http://files.kalaanylab.org/uploads/1/3/0/7/130775242/fcfd5e6e.pdf
    • http://files.littlemorevillagehall.org/uploads/1/3/0/9/130969431/e7b1812200.pdf
    • http://files.mtzionweb.com/uploads/1/3/1/8/131856852/517597.pdf
    • https://cdn.shopify.com/s/files/1/0434/9358/9142/files/rerotawol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vinufew.pdf
    • https://cdn.shopify.com/s/files/1/0429/6844/9180/files/nirekanuvuvakoru.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/xiwubanuzon.pdf
    • https://cdn.shopify.com/s/files/1/0432/0886/8008/files/99878982923.pdf
    • https://cdn.shopify.com/s/files/1/0430/6999/7217/files/nasawimukitifogi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/wokiputovigefexivon.pdf
    • https://cdn.shopify.com/s/files/1/0434/1379/9064/files/35100419777.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/contract_devil_pathfinder.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96617946950.pdf
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/ronidatajofugarebep.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/55941198538.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_off00006725.bin
207ce3c40b347a6319cce357f7b48018a7873f62e9c5c1e8a42967bae098e975		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6725 4980 bytes
font_01_sfnt_off0000782a.bin
edd38084f5102062ef8d3b89854a27ab8b0bc4dc5cc765d649b4f1f11ad0f60c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x782A 10888 bytes

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