Malicious PDF — malware analysis report

Static analysis result for SHA-256 d509724ce9836504…

MALICIOUS

PDF

41.3 KB Created: 2020-09-17 07:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8a33840a001afef89037b457dd6b4d8 SHA-1: df95a57148fdc29f05ff01dc2df3142e506f8822 SHA-256: d509724ce98365040bf0e1476221e5fe3797277ddb3dc75ced80caecf9495654
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, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector infrastructure, and another flagged the document as a link farm. The document body, though heavily obfuscated, contains references to "Vera Bradley patterns outlet" and the malicious redirector URL, suggesting a lure to drive traffic to potentially malicious content. 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.me/pify?keyword=vera+bradley+patterns+outlet
    • http://xawufir.topnotchfrenchies.com/uploads/1/3/0/7/130775432/lapuxom-ligezosupa-lusisekewamefux-kuguzamanidomu.pdf
    • http://penodijug.fsk-midpen.com/uploads/1/3/1/4/131454012/2036984.pdf
    • http://jerafakij.pennydavis-artanddesign.com/uploads/1/3/1/4/131408170/xavolewazavawenuge.pdf
    • http://fijomox.tresrioshabitat.com/uploads/1/3/2/6/132681361/401024.pdf
    • http://files.gpaas.org/uploads/1/3/0/7/130740092/xozedidiboluzi_noxuvazegov_nemavefosiruga_gabigogatilib.pdf
    • http://gazitoxek.richfeenstra.com/uploads/1/3/1/4/131454215/soxewedulu_xunoromurato.pdf
    • http://xegenikam.cathycarterartist.com/uploads/1/3/0/7/130775565/e747448a7076.pdf
    • http://files.adultedresources.com/uploads/1/3/1/6/131606127/9b158.pdf
    • https://cdn.shopify.com/s/files/1/0431/4982/0065/files/tujemorudutu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/introduction_to_automata_theory_ullman.pdf
    • http://guxufom.ccsboise.square.site/uploads/1/3/0/8/130874601/8c076a82c8e421.pdf
    • https://41ffa30e-7c95-4b18-a650-c0a1b032b4d4.filesusr.com/ugd/ccf397_69fe5f390805401681d3f41a7cf6dc8e.pdf?index=true
    • https://2d084ccf-03ca-409f-8a60-221b5c0eb7d6.filesusr.com/ugd/f80014_d11ac94edd814b9283cb21bae96e186c.pdf?index=true
    • https://fc133085-1a1f-4cc5-a169-ca34b6cc3d7a.filesusr.com/ugd/18574e_eae8692686f74431a8dff975930ab30a.pdf?index=true
    • https://f79c45a7-9d93-48da-b6f3-f60072ddda6e.filesusr.com/ugd/04e6f9_600d442d09134b04a3572074c83a5b86.pdf?index=true
    • https://30d89989-7c31-4dbb-9901-4293f2372a4e.filesusr.com/ugd/8e7730_05f3e166fb9a475a883618c4617fbfa6.pdf?index=true
    • 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_off000061dd.bin
58180f22a96d68220f71891763f24e45ce2f80c556f7c30b03abfe1707e93907
pdf-font-stream PDF embedded font (sfnt) at offset 0x61DD 5160 bytes
font_01_sfnt_off00007379.bin
16be943a8c292d9b7911916dda0265be74044dd551adad3aaeb69416f3da95db
pdf-font-stream PDF embedded font (sfnt) at offset 0x7379 10912 bytes