Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3064df3cfe7665b…

MALICIOUS

PDF

45.2 KB Created: 2020-08-13 00:31:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99e3b49af698cac1e3fafbb9a01a0b03 SHA-1: 340339d14f82d8c634e523bddb7524c146793886 SHA-256: f3064df3cfe7665b2f23c6f8e32189421ca9e6e7676a9fda8c20fcca5a1246ee
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body text is heavily obfuscated and contains the primary malicious URL, suggesting a lure to a malicious site. No scripts were extracted from this sample.

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.ru/pify?keyword=l+apiculture+pour+tous+pdf
    • http://files.grandvalleyathletics.com/uploads/1/3/0/9/130969548/tovobuzagi_bomagegutufoj.pdf
    • http://vibam.terigarrett.org/uploads/1/3/2/7/132710780/zisozaterul_milusud_melemizoneroje.pdf
    • http://files.visitozapplications.org/uploads/1/3/1/4/131407549/260297567.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/sublime_text_multiple_cursors.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdf
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/ou_sample_teams.pdf
    • https://cdn.shopify.com/s/files/1/0432/5372/7394/files/8557719593.pdf
    • https://cdn.shopify.com/s/files/1/0440/6290/0374/files/41797576709.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/vezoxilobagonabuwos.pdf
    • https://cdn.shopify.com/s/files/1/0434/7419/0498/files/37297335296.pdf
    • https://cdn.shopify.com/s/files/1/0434/6304/9378/files/ap_intermediate_zoology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/5298/9607/files/49258730706.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2533/files/74981529905.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000617d.bin
bb19e754590ec0fb3d5af73dc5c944f2f5e181d326253156080f155037f9720e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617D 4868 bytes
font_01_sfnt_off00007216.bin
f8c2f1d260f1f8621c43acf0d4191773d7eaa85ba7a0f5907ce8b04b19826132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7216 12336 bytes
font_02_sfnt_off00009869.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9869 4324 bytes

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